Please HELP! I have a burning desire to know how luxury breakfast restaurants (I'm talking like expensive yuppy brunch places like Waldorf Astoria hotel and Sweet Maple in San Fransisco) make their pancakes. It is IMPOSSIBLE for me to find correct information on how to do it because everyone that I read online is looking for the exact opposite of what truly makes a good pancake. If you look online for the best pancake recipe, all you'll see is recipes talking about ways to make the pancakes as fluffy and light as possible. At Sweet Maple, they are called Buttermilk Thin Pancakes. However, from my experiences dining at these luxury restaurants, their delicious pancakes are completely opposite from that: they are thinner (not as thin as crepes or Swedish pancakes mind you), not fluffy, and they also are NOT fall-apart crumbly. They are actually quite chewy and sort of dense in a way! It's hard to explain to most people that haven't tried it why this is a more desirable pancake texture, but trust me, once you have these pancakes, you'll never seek out recipes of the typical American diner being thick, light, and fluffy. The only piece of info I've been able to discover about these mysterious pancakes is the restaurant told me they are more of a European style than an American style, but that doesn't tell me much. Are they using different types of flour that only restaurants can get? Are they leaving out baking soda/powder to get that texture? I need a pro/restaurant baker to help out here! I would be so grateful. PS: Yes I've seen the other thread of someone asking essentially the same question (), I only hope I can get better answers from the right people this time around. Update, here are some pics of the pancakes I found online. Hard to see the thickness though.

Every recipe I can find is for "fluffy" pancakes.  I prefer thinner, slightly crispy, (very) slightly chewy, non-fluffy pancakes.  Basically, the less "cake-like" the better.  Apparently I'm the only one, and these are all non-desirable qualities in a pancake, so it is hard to find recipes.  How can I make non-fluffy pancakes?  I will be using a cast-iron pan.


Whenever I run sudo apt-get update I get The following error:  Ign:1http://ppa.launchpad.net/cpug-devs/ppa/ubuntu bionic InRelease Ign:2http://dl.google.com/linux/chrome/deb stable InRelease                    Hit:3http://in.archive.ubuntu.com/ubuntu bionic InRelease                      Hit:4http://dl.google.com/linux/chrome/deb stable Release                      Err:5http://ppa.launchpad.net/cpug-devs/ppa/ubuntu bionic Release                404  Not Found [IP: 91.189.95.83 80] Hit:6http://security.ubuntu.com/ubuntu bionic-security InRelease               Hit:7http://in.archive.ubuntu.com/ubuntu bionic-updates InRelease Hit:9http://in.archive.ubuntu.com/ubuntu bionic-backports InRelease Reading package lists... Done                       E: The repositoryhttp://ppa.launchpad.net/cpug-devs/ppa/ubuntu bionic Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.   I understand that  E: The repositoryhttp://ppa.launchpad.net/cpug-devs/ppa/ubuntu bionic Release' does not have a Release file.   is the error. So how do I fix it?  [Edit]  I have found the problem is solved(I just removed the problem causing repo ).

PPA seems to be constantly offline. Whenever I use sudo apt-get update, this error is shown:  W: Failed to fetch http://ppa.launchpad.net/ 404  Not Found   How do I fix these errors?


I’ve been trying to get handlatex () to work with miktex 2.9 and texnicCenter on windows 7.  I tried copying it in the miktex directories: tex/latex and tex/xelatex without success. Unfortunatly I was not successful finding any hints on google. The latex code I’m using right now is:  \documentclass[a4paper,11pt, titlepage,]{scrartcl}   \usepackage[T1]{fontenc} \usepackage[lowwordangle=-3,highwordangle=3]{hand} \usepackage{amssymb}  \begin{document}  \thispagestyle{empty}  \section*{\texttt{hand}\LaTeX\ Demo}  \vfill  \begin{handpar}  Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Duis ut libero et arcu interdum varius. Nam bibendum, mi sed consequat malesuada, nunc diam condimentum massa, sit amet egestas nibh ligula sit amet dui. Vestibulum eu urna. Etiam vestibulum. Aenean nisi nulla, fringilla at, laoreet eu, iaculis id, diam. Mauris aliquet vehicula lacus. Maecenas id nisl ac justo sodales dictum. Phasellus eget eros. In hac habitasse platea dictumst. Nam ut tortor vitae dui mollis egestas. Nullam sagittis libero quis nibh. Donec aliquam. Donec tincidunt. Aliquam eget nisl. Suspendisse mollis pellentesque nunc.  \end{handpar}  \vfill  \noindent $\blacksquare$  \end{document}   This is the error Message I’m getting:  ! LaTeX Error: File `hand.sty' not found.  Type X to quit or <RETURN> to proceed, or enter new name. (Default extension: sty)  Enter file name:  ! Emergency stop.   It would be great if somebody could tell me how to install handlatex correctly in miktex. Greetings betlor

I'm new to LaTeX, investigating using it for some work projects.  I'm using MiKTeX on Windows.  My employer's locked-down network blocks the application's automatic installation function.  I can take my laptop home and successfully install from there, but if I need a package in the middle of the day I'm stuck.  I am able to access the CTAN website and download the package files (.dtx or .ins?), but I don't know what do do with them.  How can I do a manual package installation?


let $\{w_1,w_2,...,w+m\}$ be an orthonormal set in a space ($V$). I want to prove that given an arbitrary vector $v\in V$ , the following stands: $$ \sum^m_{i=1}\left|\left<w_i,v\right>\right|^2 \le \|v\|^2 $$ it is also mentioned that the equality occurs when our set of $w_i$s is a basis for the space $V$. (assuming it is a finite-dimensional space) I have tried opening the $|\left<w_i,v\right>|$s to $|w_i||v|\cos\theta_i$ where $\theta_i$ is the angle between each orthonormal vector and our $v$. This gives us $m|v|\sum \cos\theta_i$ but I cant get anywhere from this. Thanks in advance!

If the set $\{f_1, ..., f_n\}$ is an orthonormal subset of inner product space $E$ and $f\in E$ then how can I show that:      $$\sum_{i=1}^n | \langle f, f_i\rangle |^2 \leq \Vert f \Vert^2.$$   How can I prove this inequality? What is the key step to notice?


I am trying to upgrade ubuntu 16.04 and I get this error, can you help please ?  $ sudo apt upgrade Reading package lists... Done Building dependency tree        Reading state information... Done Calculating upgrade... Done The following packages were automatically installed and are no longer required:   libgsoap8 libvncserver1 linux-headers-4.4.0-116   linux-headers-4.4.0-116-generic linux-headers-4.4.0-119   linux-headers-4.4.0-119-generic linux-headers-4.4.0-121   linux-headers-4.4.0-121-generic linux-headers-4.4.0-124   linux-headers-4.4.0-124-generic linux-image-4.4.0-116-generic   linux-image-4.4.0-119-generic linux-image-4.4.0-121-generic   linux-image-4.4.0-124-generic linux-image-extra-4.4.0-116-generic   linux-image-extra-4.4.0-119-generic linux-image-extra-4.4.0-121-generic   linux-image-extra-4.4.0-124-generic Use 'sudo apt autoremove' to remove them. The following packages have been kept back:   python-qgis python-qgis-common qgis qgis-common qgis-plugin-grass-common   qgis-provider-grass qgis-providers qgis-providers-common 0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded. 3 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [O/n] O Setting up keyboard-configuration (1.108ubuntu15.4) ... git: 'LC_CTYPE=fr_FR.UTF-8' is not a git command. See 'git --help'. dpkg: error processing package keyboard-configuration (--configure):  subprocess installed post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of console-setup-linux:  console-setup-linux depends on keyboard-configuration (= 1.108ubuntu15.4); however:   Package keyboard-configuration is not configured yet.  dpkg: error processing package console-setup-linux (--configure):  dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of console-setup:  console-setup depends on console-setup-linux; however:   Package console-setup-linux is not configured yet.  console-setup depends on keyboard-configuration (= 1.108ubuntu15.4); however:   Package keyboard-configuration is not configured yet.  dpkg: error processing package console-setup (--configure):  dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure.                           No apport report written because the error message indicates its a followup error from a previous failure.                                                     Errors were encountered while processing:  keyboard-configuration  console-setup-linux  console-setup E: Sub-process /usr/bin/dpkg returned an error code (1)   EDIT: This partially fixed my issue : . There is no more error but now Ubuntu won't boot : black screen

I am trying to boot Ubuntu on my computer.  When I boot Ubuntu, it boots to a black screen.  How can I fix this? Table of Contents:


I cannot enter a directory after creation in a folder with an ACL: I am attempting to limit rwx access to a folder for just a single group and no one else. I would like to be able to add new users to a group and have them gain access to a directory.  This is what I have done so far   mkdir /mnt/files cp /media/usb0/backup/* /mnt/files chgrp filers /mnt/files chmod -R g+s /mnt/files setfacl -b /mnt/files  # to remove user and other setfacl -R -d -m g:filers:rwx /mnt/files getfacl /mnt/files  # file: mnt/files/ # owner: root # group: filers user::--- group::rwx other::--- default:user::--- default:group::rwx default:group:filers:rwx default:mask::rwx default:other::---    So far everything looks good . . .   cd /mnt/files mkdir test ls -l  d---rws---+ 2 jimmy filers 4096 Nov 28 14:32 test  cd test  -bash: cd: test/: Permission denied    Any reason I can't enter the folder I just created?   getfacl ./test  # file: test # owner: jimmy # group: filers # flags: -s-  user::---  group::rwx  group:filers:rwx   mask::rwx  other::---  default:user::---  default:group::rwx  default:group:filers:rwx  default:mask::rwx  default:other::---

I just ran into something unexpected (for me) regarding file permissions on Linux (Arch Linux). Basically I have:   userX in groupX fileX userX:groupX ---rwx----   What puzzles me: I cannot perform any action (rwx) on fileX. Is this right? Can someone please confirm this is indeed the expected behaviour?  The only actions I can perform are mv and rm because I have write permissions on the parent directory.  The thing is, I always thought these permissions collapse on each other, starting with the most general one (other -> group -> user). In other words, if o=rwx who cares what the persmissions for group and user are? Apparently this is not the case but it doesn't make much sense to me; it seems counterintuitive. The only thing this approach seems to be useful at, is to easily exclude a very specific person / group, which doesn't seem like a smart way to go at it (imho). Besides, the owner (and group?) should be able to chmod anyway right? Any thoughts on this matter?


I am currently working on a hand-crafted gamemaster screen made out of wood for a good friend of mine. I am planning on not using the DnD 5e "orignal" GM Screen as inlay, but creating a unique layout. Since I am not that well versed in D&D I am now wondering which information would be good and useful for the DM that might be needed during campaigns.  I was also thinking of adding some blank boxes with headings, where the DM might write some Information that is useful for him depending on the campaign (this would of course be erasable since I am going to foil the inlay to be then written on with whiteboard markers).  Any suggestions for the pre-written information and the blank boxes to be written on are very appreciated.  Also any additional advice or ideas are very welcome.

The question is, what elements on a DM screen are essential? I'm new at playing and DMing, altough a lot of experience watching games, just got a group to play with now. Started with the starter set in 5E and the Lost Mine of Phandelver adventure, however I've noticed the game can come to a stop when checking the rules or how to do something, while getting the books and stuff like that. So I thought to make a DM screen with some cheat sheets, of the most usual things new players, and new DM's have doubts on, and how to make the game flow well without long rule-checking breaks. What are the essential things to have on that screen? So far this is what I found  but not sure if it has all I need or so much stuff that'll also make the game stop a lot while cheking it out.


Only mods can see deleted comments        Why can only mods see deleted comments, but any user with sufficiently high rep can see deleted questions and answers?  I am not saying this is a bad idea. (Though if you think it is, I'd love to know why.) I am curious what the significant difference between questions/answers and comments is in this respect.  My current thoughts:  Advantage: Most deleted comments are garbage.  Disadvantage: There isn't any real way to "audit" or discuss moderator behavior, as with deleted posts. This cascades into other areas, such as the decision to lock a post because of (deleted) off-topic comments (see ).  In my limited experience most deleted posts are garbage too. What is the significant difference?

If moderators can view , can we see comments we've deleted? We can see our deleted answers, but why not our deleted comments?


I have the statement $P(n)$: $2^n<(n+1)!$, for $n \geq 2$;  $P(2)$: $2^2 < 3!$ which is true  I.H P(k): $2^k<(k+1)!$  show that $P(k+1)$: $2^{k+1} <(k+2)!$  Here is my approach:  $2^k<(k+1)!$ multiply both sides by $2$  $2*2^k<2*(k+1)! \Rightarrow 2^{k+1} < 2*(k+1)!$  since: $(k+2)! = (k+2)*(k+1)! \Rightarrow k*(k+1)! + 2(k+1)!$  hence: $k*(k+1)! + 2(k+1)! > 2(k+1)! \Rightarrow (k+2)! > 2(k+1)!$  we can show that: $2^{k+1} < 2(k+1)! < (k+2)! \Rightarrow 2^{k+1} < (k+2)!$  for $n \geq 2$  I need a feedback about my approach and any correction in case of mistakes.

Possible Duplicate:          Prove by induction that $n!>2^n$ for all integers $n\ge4$.  I know that I have to start from the basic step, which is to confirm the above for $n=4$, being $4!>2^4$, which equals to $24>16$.  How do I continue though. I do not know how to develop the next step.  Thank you.


I wish to connect my phone to internet using my laptop's hotspot (laptop uses wired internet connection). The phone is Android 9, the laptop has Debian 10. I have created a hotspot: nmcli device wifi hotspot con-name "debian_hotspot" ssid "debian_hotspot" password "passw" which works fine for another laptop. But it has been pointed out that Android devices usually need an "Access point" instead of "Ad hoc" network. I have attempted to change this using the network manager gui, but when I try to nmcli -p connection up "debian_hotspot" I get: No suitable device found for this connection (device wlp6s0 not available because profile is not compatible with device (the device does not support Access Point mode)). I have found some tutorials using wpa_supplicant or hostapd. But as far as I understand the current Debian "default" is using NetworkManager. How can I create a full "access point" using NetworkManager (happy with the applet GUI, but nmcli is great too)? How can I share internet connection with an Android phone using NetworkManager?

How can I create a Wi-Fi hotspot with the command line tool nmcli and share/bridge the ethernet internet connection with the wireless access point? Furthermore, how can I start this automatically at boot? Is this possible with nmcli?


I have an issue with my website: Google isn’t using my meta description, instead it’s using the content of the web page and I’m really confused.  Reason I’m confused is because I have checked and I don’t have duplicate page titles, description nor keywords, neither do I have any robots.txt for my website. My page title, description and keyword is unique, and page description is about 150 characters.  I have my site in Google Webmaster Tools and I checked for errors, but found none.  So I really don’t know why Google Search isn’t using my meta description.

When you do a Google search, there is typically a snippet of sample content from the page. I seem to recall that the Meta Tags can influence this choice of descriptive sentences. Is that correct(?) and if so, is it the Meta Description Tag?  Also, how many characters is Google's descriptive sentences limited to?


In the FAQ of the Boomerang decompiler (which currently only decompiles to C-code) they make a brief mention that Visual Basic exes happen to include a lot of metadata, so a Visual Basic decompiler might be able to produce better source code for Visual Basic programs than what Boomerang can give you.  Since the program I'm trying to decompile might actually be a VB 6 program, do you know of any decompilers for VB6 exes?  (Don't worry this isn't for nefarious purposes.  I just have to create a data file this program parses, and getting a sense of the strategy it uses to parse the file will help get the file format right.)

I lost the source code from one project I did on the company I'm working for and haven't been able to find a Visual Basic 6 decompiler; does that even exists?  I only have the EXE that I've rescued from a user's machine.


Does anyone knows how to show $$\int_0^1 x^a(1-x)^b dx = \frac{\Gamma(a+b-2)}{\Gamma( a -1)\Gamma(b-1)} $$ for $a,b \gt -1?$ Also why it doesn't work for $a$ or $b\lt -1$ ?

I'm trying to prove that for $p,q>0$, we have $$\int_0^1t^{p-1}(1-t)^{q-1}\,dt=\frac{\Gamma(p)\Gamma(q)}{\Gamma(p+q)}.$$    The hint given suggests that we express $\Gamma(p)\Gamma(q)$ as a double integral, then do a change of variables, but I've been unable thus far to express it as a double integral.  Can anyone get me started or suggest an alternate approach?  Note: This wasn't actually given to me as the $\Gamma$ function, just as a function $f$ satisfying $$f(p)=\int_0^\infty e^{-t}t^{p-1}\,dt$$ for all $p>0$, but I recognized that. This is in the context of an advanced calculus practice exam.


When I try to install ubuntu it comes up with a black screen that reads:[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x52 (or later). Then the screen freezes and I cannot type anything like other guides say. Does anyone know whats wrong?

I saw several bugs and error messages when I was looking by chance into the tool called "logs".  Being a newbie in Ubuntu I have no idea how to deal with these bugs, where to report them or how to fix them.  Any help to guide me here?  The bug I have (which is listed under important) reads:  [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x52 (or later)


When I read the papers, I sometimes see the phrases energy saving and energy savings. I don't understand how they are different. Compare these sentences:     1) However, the maximum energy saving obtained by the OTMR scheme depends on appropriate speed setting for the processing units, which in turn is determined by the system power characteristics.       2) As we discussed earlier, the processing speed for the ﬁrst two processing units in OTMR systems is critical in energy savings.      3) However, if it is possible to reduce the voltage at all by running slower, then there will be a net energy savings per cycle.   How are they different?

Assume that A and B are two systems. For example A consumes 3unit and B consumes 4unit of the energy. Now we know to A saves 0.25% in energy consumption than B.I want to draw a diagram and want to type on the y axis. I would like to which of these is correct:        . . . the energy saving ratio of A to B . . .    . . . the energy saving ratio of A than B . . .    . . . the energy savings ratio of A to B . . .    . . . the energy savings ratio of A than B . . .    . . .. or?


I'm wondering why gcc doesn't display an error while compiling, even while using the -Wall option. Also tried the -std=c89 option.  Here's the code:  #include <stdio.h>  int main(void) {    printf("hello, world\n"); }   Sorry if this post is a duplicate but couldn't find a case where this option is being used.  Thanks!

What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — and why? And how about the arguments? If int main() then return 1 or return 0?  There are numerous duplicates of this question, including:       — For C++, with a very good answer indeed.     Related:


Suppose there is a class: class C:     def __init__(self):         self.data = [1, 2, 3, 4, 5]  How to implement support for list() function so that: c = C() l = list(c)  so that l = [1, 2, 3, 4, 5]?

How would one create an iterative function (or iterator object) in python?


What is the meaning of q $\equiv 1\pmod p$?  If I were to write this as a definition, how would I explain with this means?

In an Introduction to Abstract Algebra by Thomas Whitelaw, he gives examples of the congruence mod operation, such as $13 \equiv5 \pmod4$,  and $9 \equiv -1 \pmod 5$. But when I first learned about the modulo operation my junior year, I would have told you that $13 \equiv 1 \pmod 4$, and that $9 \equiv 4 \pmod 5$.     Is this just a difference in the definition of modulo? Or is this pretty typical (to not take it to the largest factor, or one over)?


When people discuss quantum field theory in a popular context, they say that fundamental particles, such as quarks and electrons, are pointlike, with zero size.  However, I don't think this is what QFT says at all. My impression is that a particle is an excitation of the field, and hence a wavepacket with finite size. Of course, you can have a spike in field value at a single point, like $|x \rangle$ in quantum mechanics, but this state is pathological, and it's definitely not what we mean when we say 'particle'.  Interactions between fields are local and hence only happen at a single point. But to calculate the result of a scattering, you have to integrate this over the positions where the incoming wavepackets overlap. So it doesn't make sense to say that interactions occur at a point either.  If field excitations are not pointlike, and interactions of fields don't occur at points, then what do people mean when they say particles are pointlike?   Edit: I don't think  answers mine. The top voted answer just reiterates that the Lagrangian is local, but most of the time people seem to be making the much stronger statement that particles are perfectly localized. As argued above, these are not the same thing. I'm wondering if there's any justification for the latter, or if it actually doesn't make sense.

String theory gives physicists reason to believe that particles are 1-dimensional strings because the theory has a purpose - unifying gravity with the gauge theories.   So why is it that it's popular belief that particles are 0-dimensional points? Was there ever a proposed theory of them being like this? And why?   What reason do physicists have to believe that particles are 0-dimensional points as opposed to 1-dimensional strings?


Given x and y denoting count of two different items, also given a value K. We need to select a total of K items from those X+Y items such that the count of chosen X items is odd. For example, X=4,Y=3,K=3. then number of ways= (4C1)(3C2)+(4C3)(3C0) here nCr denotes n!/(r!*(n-r)!) Is there any formula to calculate this?

How do I simplify: $$\sum_{r = 0}^{\lfloor \frac{k}{2} \rfloor} \dbinom{k}{2r} \cdot \dbinom{n-k}{k-2r}?$$ Basically, the sum is: $\dbinom{k}{0} \cdot \dbinom{n-k}{k} + \dbinom{k}{2} \cdot \dbinom{n-k}{k-2} + \dbinom{k}{4} \cdot \dbinom{n-k}{k-4} \cdots.$ This seems very similar to Vandermonde's Identity but because we skip two everytime instead of one, I don't see how I can apply it to this problem.


It seems that there may have been life on Mars, and it's also tempting to terraform and colonize the planet. This question is about testing the hypothesis "Can primitive life survive on Mars?". This is closely linked to the , that life can be seeded from bacteria on meteorites. The hypothetical experimental setup is as follows:  Take microorganisms that live in the upper atmosphere and  Recreate their natural environment in a lab, and let them live there Slowly change the environment to be more similar to Mars: pressure, temperature swings, radiation, relative gas concentration See if they are able to adjust  My question is: Is this possible? Has anyone done it, or is doing it currently? I know tardigrades are being sent to the moon, but they're hardly thriving there. My apologies if the non-expert question is off topic. If you can suggest a more appropriate place to ask, I'll keenly do so.

Do we know of any living forms on Earth that could continue to live on Mars?


My home page in Firefox [v4.0] and Internet Explorer [v9.0.8112.16421, Update Versions RTM (KB982861)] is currently set to Google but when I depress the quick start icon to start up either browser, I am getting the following immediate results:  Unable to connect (In Firefox)     Firefox can't establish a connection to the server at www.google.com.         The site could be temporarily unavailable or too busy. Try again in a few moments.   If you are unable to load any pages, check your computer's network connection.   If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.      Internet Explorer cannot display the webpage     What you can try:      Diagnose Connection Problems      More information      This problem can be caused by a variety of issues, including:         Internet connectivity has been lost.   The website is temporarily unavailable.   The Domain Name Server (DNS) is not reachable.   The Domain Name Server (DNS) does not have a listing for the website's domain.   There might be a typing error in the address.   If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section.         For offline users      You can still view subscribed feeds and some recently viewed webpages.      To view subscribed feeds:          Click the Favorites button , click Feeds, and then click the feed you want to view.         To view recently visited webpages (might not work on all pages):          Press Alt, click File, and then click Work Offline.   Click the Favorites button, click History, and then click the page you want to view.      Thankfully, I am able to use one browser that I have installed on my computer (Mathon v3.0.20.5000) to search online for technical assistance in this matter.  I have seen several WinSock error issues mentioned; but, they are pointing to Windows XP and I am using Windows 7 Pro and remain uncertain whether anything identified as a fix for one OS will work in another.  Things I've tried:   HiJackThis Complete scan with Avira AntiVirus Premium.   What am I overlooking?  What should I do to address this problem?

If I can generally reach web pages on the Internet but can't reach a specific one, how do I troubleshoot what the cause is as an end user?       This question was a .   Read the  for more details or  yourself


I have an VPS that has a pre-installed DirectAdmin and exim mailservice. But i've got a complainment from my client.  When he tries and send an e-mail from his account to someone it gets flagged as spam.  Here is the full e-mail message with all the headers and stuff. i hope someone can help me      Authentication-Results: hotmail.com; spf=pass (sender IP is 141.138.205.229) smtp.mailfrom=info@dutchtwinz.com; dkim=none header.d=dutchtwinz.com; x-hmca=pass header.id=info@dutchtwinz.com X-SID-PRA: info@dutchtwinz.com X-AUTH-Result: PASS X-SID-Result: PASS X-Message-Status: n:n X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0wO0Q9MjtHRD0yO1NDTD00 X-Message-Info: /3z5fcrqMMU004j2/ma9gxjYaCTHh1SYDRkBozv0u0RQKYi/p3JnhYDq+fCL9gd4ZoOdwyC8ZUOO2jFRJx3dhfsqqC1/dh3dpEFRPyEuAPqxYkG1kNuhS/+RxWTrmmRKMIiVYIDsa9HA3Jo5r2TlC2nKN74iRkxxZa345HzmY6vbD4SELXiO9OGS366OsWVIWlbDpo9jcpthAtNsCaKurN4SaoraB0Mk Received: from 117.lemoninternetbureau.nl ([141.138.205.229]) by SNT004-    MC3F21.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.22712);  Sun, 21 Sep 2014 06:48:32 -0700 Received: from localhost ([127.0.0.1] helo=webmail.dutchtwinz.com) by 117.lemoninternetbureau.nl with esmtpa (Exim 4.82) (envelope-from <info@dutchtwinz.com>) id 1XVhV9-0004Nt-28 for lemoninternet@outlook.com; Sun, 21 Sep 2014 15:48:31 +0200 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="=_12ba68aba8975b804caf848a8d980657" Date: Sun, 21 Sep 2014 15:48:31 +0200 From: Dutchtwinz <info@dutchtwinz.com> To: lemoninternet@outlook.com Subject: Test Organization: DTE Booking Agency Reply-To: info@dutchtwinz.com Mail-Reply-To: info@dutchtwinz.com Return-Receipt-To: Dutchtwinz <info@dutchtwinz.com> Disposition-Notification-To: Dutchtwinz <info@dutchtwinz.com> Message-ID: <d37039273be133d3b75de0c752fc884b@dutchtwinz.com> X-Sender: info@dutchtwinz.com User-Agent: Roundcube Webmail/1.0.0 Return-Path: info@dutchtwinz.com X-OriginalArrivalTime: 21 Sep 2014 13:48:32.0602 (UTC) FILETIME=[BB9C13A0:01CFD5A2]  --=_12ba68aba8975b804caf848a8d980657 Content-Transfer-Encoding: 7bit Content-Type: text/plain         Test --  Public Relations Dutch Twinz Entertainment Amsterdam, The Netherlands Tel: 0031 645241556 Website: http://www.dutchtwinz.com  --=_12ba68aba8975b804caf848a8d980657 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=UTF-8  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
Test --=20 Public Relations Dutch Twinz Entertainment Amsterdam, The Netherlands                                           Tel: 0031 645241556                                                     Website: http://www.dutchtwinz.com
    --=_12ba68aba8975b804caf848a8d980657--

This is a  about how to handle email sent from your server being misclassified as spam.  For additional information you may find these similar questions helpful:                    Sometimes I want to send newsletters to my customers. The problem is, that some of the emails get caught as spam messages. Mostly by Outlook at the client (even in my own Outlook 2007).  Now I want to know what should be done to create "good" emails. I know about reverse lookup etc., but (for example), what about a unsubscribe link with an unique ID?  Does that increase a spam rating?


This question refers specifically to questions posed by individuals that are clearly using English as a second language. It does not refer to people who are making minor mistakes in their native language.  I don't want to seem pedantic, but I see some good questions that are written in English as a second language, with some detracting grammar and spelling mistakes.

Some individuals may be sensitive to edits of their posts on the basis of spelling or grammar. Some editors may be concerned about what to put in as a reason/explanation for the edit. New editors, in general, are likely uncertain of what the accepted "etiquette" is, on these sites, for such corrections.


I could not see any way to list all posts I upvoted.  Profile page only shows the counts for upvotes & downvotes.  It would be good if there was a way to list all posts for which we have used upvotes/downvotes. It would help us rectify if we made any mistakes, and I think it would be useful to refer to all the posts I have upvoted (as upvoting mostly implies its a useful post and more likely that I may need to refer to it later).

My profile page used to have a votes tab that showed me what my latest X votes were. It is not there anymore. What happened to it? Why was it removed? I looked everywhere but couldn't find anyone talking about it. I use this often to go back to downvotes and see if they've been edited to fix a problem so I can then remove my downvote.  Edit: I made this a feature request to bring this functionality back.


It's for printing in a scaffold sheeting roll and client wants me to format it in three different sizes:  3m x 45m – 2m Height Print 3m x 45m – 1.8m Height Print 2m x 45m – 1m Height Print  I'm not really sure how to go around with this. Can anyone help me or explain what they meant? They also asked me to download a different software just so I can set the width to 45m for printing.

(This question is meant to be a resource to direct others to given that this is a common question.)  Given the task of creating an image that will be printed at a certain size, what pixel dimensions and resolution should I be setting my file at?


When magnetic flux is changed linked with the coil the the electric field is produced inside the coil. But this electric field is non-conservative field whereas the electric field produced by the static charge is conservative. Why when the magnetic flux is changed linked with the coil electric field induced is nonconservative? Why a static charge produce conservative Field?

I have been reading about the electric field induced on a metal ring due to an increasing magnetic field directed along the axis of the ring and the electric field lines are found to form concentric circular loops. This implies that the electric field formed is not conservative. Why is it so? Are electric field due to free charges and those due to changing magnetic field two entirety different  things?  Please provide an intuitive and less mathematical explanation as I am just a high school student with knowledge of basic calculus.


Reals are often introduced as limits of bounded sequences of rationals. But how can we built the set of such sequences, even a single sequence without axiom of choice? Each element of the sequence is chosen from the set of rationals. But we for sure can make such choice infinite times only due to axiom of choice. Where I am wrong?

I realize this is possibly a copy of another question (The Axiom of Choice and definability) but I would appreciate an explanation with less set theoretical explanations if that is at all possible.  I recently took the opportunity to look up the axiom of choice (AC). Wikipedia has both a formal and an informal definition.  Based on my shortcomings in set theory I have to rely on the informal version: “given any collection of bins, each containing at least one object, it is possible to make a selection of exactly one object from each bin”.  It seems that this can be used to define an endless series of decimals such as an arbitrary number x between 0 and 1, in term corresponding to an arbitrary positive real number through such a function as f(x)=1/x-1, i.e. it can be used to define any real number (assuming a real number is an infinite decimal series).  A beauty spot is the cases of 0.99999… and 1.00000… - discussed in a number of questions on the site. It points to several issues:  I argue, albeit in a roundabout way, that for a choice involving the AC to have any value then the number received through the choice must also allow for existing mathematical operations, i.e. 2*0.11111…=0.22222…  as discussed in another question. (“You're also assuming that you can multiply 0.9999... by 10 and get 9.9999... (or, rather, that arithmetic with infinite decimals works normally), which is not at all unreasonable to assume. – Isaac Jul 20 '10 at 20:59”) i)  0.99999…must be equal to 1.00000… for the same reason. ii) The fact that 0.99999…=1.00000…can challenge the one-to-one correlation between the real numbers, as we view as being without these doublets. However it can be disregarded as   I was assured in a recent question, in that removing a countable set such as 0,99999…, between the endless decimal series and 0.099999…and 0.0099999…  etc. from a uncountable set would not change the one-to-one correlation to numbers without this anomaly. (I was referred to i.a. the Cantor–Bernstein–Schroeder theorem).  Reasoning in this manner I perceive the AC to be identical of postulating - or at least allowing for the definition of – real numbers. My question is whether or not this is the case.  Edit much later: I should add that I primarily am looking at the problems of defing invividual real numbers, so called pointwise definition, rather than definition of the whole set of reals. I didn't realize at the time that these are two different issues.


I was using a server that has PHP 5 on it, and now I migrated to a different server, but it only has PHP 7. The problem is that when I did a backup on the old database server, everything was UTF-8 encoded. When I inserted a row, in the database it stored like this: cafÃ© But now, when I insert something, it stores it like this: café The problem is that now, when I select anything old, it doesn't decode back. I tried set the meta tag and headers in PHP to UTF-8, but it didn't work. I don't mind store it decoded, but I need to be able to read correctly the old data that is stored encoded, but I can't use utf8_encode in every query. Thank you.

I'm setting up a new server and want to support UTF-8 fully in my web application. I have tried this in the past on existing servers and always seem to end up having to fall back to ISO-8859-1.  Where exactly do I need to set the encoding/charsets? I'm aware that I need to configure Apache, MySQL, and PHP to do this — is there some standard checklist I can follow, or perhaps troubleshoot where the mismatches occur?  This is for a new Linux server, running MySQL 5, PHP, 5 and Apache 2.


I see that I can run:   notify-send -u low -i terminal "yo"   and   notify-send -u low -i error "yo"   But I couldn't find any mentions of the icon names "terminal" and "error" in the man page. How can I find out what are the other possible icon names? What are they?

I want to see what icons are installed and available on my system and by which names I have to refer to them.   How can I get a nicely formatted list of all unique icons (don't show several resolutions separately) that contains the icon name, a preview thumbnail, the location and maybe if possible where it came from (e.g. which icon theme package)?  System: Ubuntu 15.10 Wily Werewolf 64 bit Desktop: Unity


I want to know what kinds of reference can be array elements.  I know that there're primitive types like:  String[] strs = new String[5];   But there is no   List<String>[] stringList;    However, when I new a class, there is  Class Student{      String name;      List<String> courses; }  Student[] students = new Student[5];   It says "The element type of an array may be any type, whether primitive or reference."  I think Student is reference and List<> is also reference. What's the difference between them?  Thanks.

Due to the implementation of Java generics, you can't have code like this:   public class GenSet<E> {     private E a[];      public GenSet() {         a = new E[INITIAL_ARRAY_LENGTH]; // error: generic array creation     } }   How can I implement this while maintaining type safety?  I saw a solution on the Java forums that goes like this:  import java.lang.reflect.Array;  class Stack<T> {     public Stack(Class<T> clazz, int capacity) {         array = (T[])Array.newInstance(clazz, capacity);     }      private final T[] array; }   But I really don't get what's going on.


I'm looking for a way to make a low-poly tree like the image.  What's the best way of procedurally making it? Ideally, I'd like to have those ico-spheres touching each other tightly like the image. I was thinking maybe I can array a collection of ico-spheres on a sphere or a custom shape, but then I need to hide this shape, how can I do it? Or is there a completely different approach?

I have a surface with particles. But I don't want to see the original object in the render. How to fix it?   Transparency, other collection / scene doesn't work.


Where can I find the source for unix "file" command? Synaptic lists a "file" package but no file-src package. I'm not finding the source online either.

I am assuming that all application installed through apt-get are open source; but for those that are available in that manner, where can I get the source code for these applications as well as update them?   I have a couple applications I use regularly that aren't being actively developed any longer and I would like to add features. Where would I go to get the rights to update these applications?  In this case specifically, I am referring to the hellanzb package


I am working with python and doing the following.  x = [1,2,3,4,5]  def function1():   print(x)  function1()   I would think that I would get the error name 'x' is not defined but I do not, it prints the variable x even though it is not defined in the function. Why does python let me use variables that are defined outside of a function inside a function even though they have different scopes?

What exactly are the Python scoping rules?  If I have some code:  code1 class Foo:    code2    def spam.....       code3       for code4..:        code5        x()   Where is x found?  Some possible choices include the list below:   In the enclosing source file In the class namespace In the function definition In the for loop index variable Inside the for loop   Also there is the context during execution, when the function spam is passed somewhere else. And maybe  pass a bit differently?  There must be a simple reference or algorithm somewhere.  It's a confusing world for intermediate Python programmers.


According to quantum mechanics particle is not localised at one position, our act of measurement make wave function to collapse at a position(Copenhagen Interpretation). A big object(like books on my table) is made of these small particle than do this object also not well localised when no one is observing it ? Please Explain?

Quantum mechanics allows us to describe a particle as a wave, and also a collection of particles, which a car happens to be. What separates a typical wave from a classical particle is that the position is not well defined for a wave.  I think that it is hard to tell exactly how big an atom is, because the electron of the atom may be anywhere, but the probability of finding the electron gets very small as you look far away from the nuclei. I think in some sense the atom is as large as we want, depending on the definition.  When a car drives past me, is the position of the car separate from my position in a quantum mechanical way, or is it correct to say that "part" of the car hit "part" of me? I understand that no matter the answer the force from the hit is so small that it is negligible in every way, but that is not the core of the question.  In addition, if I made any wrong claims, please correct me, thanks in advance.


At the top of the second page of  paper by Ramanujan, he states that "by purely elementary reasoning", where $f(n)$ is the number of distinct prime factors of $n$, we have that for all $\varepsilon > 0$,  $$ f(n) < (1+\varepsilon)\frac{\log n}{\log \log n} $$ for all sufficiently large $n$, and  $$ f(n) > (1-\varepsilon) \frac{\log n}{\log \log n} $$ for infinitely many values of $n$, so that the maximum order of $f(n)$ is $$ \frac{\log n}{\log \log n}. $$ What's the simple reason for this he had in mind?  Thanks.  Edit: notation clarified per Thomas Andrews' comment.

I'm reading through The normal number of prime factors of a number $n$. I'm confused by a remark on the : let $f(n)$ represent the number of distinct prime factors of $n$. Then  we can shew (by purely elementary reasoning) that, if $\epsilon$ is any positive number, we have $$ f(n) < (1 + \epsilon) \frac{\log n}{\log \log n}$$ for all sufficiently large values of $n$ and $$ f(n) > (1 - \epsilon) \frac{\log n}{\log \log n}$$ for an infinity of values; so that the maximum order of $f(n)$ is $$ \frac{\log n}{\log \log n} $$  I don't follow their "purely elementary reasoning." What am I missing?


I have both Apache and nginx installed and running on an Ubuntu 14.04 LTS server at Digital Ocean. Apache is listening on port 80 and nginx on port 8080. Thus, the following http requests work:  www.mysite.org/ www.mysite.org:8080/   with the first site served up by Apache and the second served by nginx.  I would prefer the sites to be responsive to something like:  www.mysite.org www2.mysite.org   but I've not been able to get that to work yet.  I do understand the basics of virtual hosts as described in . In particular, I can get those sites working if they're both served by apache with the content served from different document roots. But what Apache configuration will send requests to www2 over to a different port served by the nginx server?

I want to install Node.js on my box (CentOS 5) for testing and sandboxing but I can't uninstall Apache as recommend by developers using Nginx.  So what I'd like to do is have Nginx serving  nodejs.sandbox.net on IP 10.10.10.10   and Apache running (usual setup)  sandbox.net on 10.10.10.10   and then on my windows host file do something like  sandbox.net 10.10.10.10:80 nodejs.sandbox.net 10.10.10.10:8080   and by the way how do I install Nginx on CentOS 5 yum?


I have some difficulties learning regex in python. I want to parse my tornado web route configuration along with arguments into a request path string without handlers request.path method. For example, I have route with patterns like:   /entities/([0-9]+)  /product/([0-9]+/actions  The expected result combine with integer parameter (123) will be a string like:  /entities/123  /product/123/actions  How do I generate string based on that pattern?  Thank you very much in advance!

I want to reverse a regular expression. I.e. given a regular expression, I want to produce any string that will match that regex.  I know how to do this from a theoretical computer science background using a finite state machine, but I just want to know if someone has already written a library to do this. :)  I'm using Python, so I'd like a Python library.  To reiterate, I only want one string that will match the regex. Things like "." or ".*" would make an infinite amount of strings match the regex, but I don't care about all options.  I'm willing for this library to only work on a certain subset of regex.


I use the Application Setting to store some settings to my portable app, but one thing that I notice is that everytime when I compile a new version with a new version number set in the assembly file, all my settings resets, returning to the default value.  Searching in the AppData folder, I've found the folder with then name of my app with more folders inside, contaning the .xml with the custom settings.  Q: How can I continue using the settings from the last version in the new one? (Without having to Ctrl+X-Ctrl-V the old settings to the folder of the new release)

Basically the problem is that each time the assembly version changes (i.e. the user installs a new version of the application) all their settings are reset the the defaults (or more accurately a new user.config file is created in a folder with a different version number as the name)  How can I keep the same settings when upgrading versions, since using ini files or the registry seem to be discouraged?  When we used Clickonce it seemed to be able to handle this, so it seems like it should be able to be done, but I'm not sure how.


Show that:  $$\left(\frac 3p\right)= \begin{cases} p \equiv 1, 11 \pmod {12} \\ p\equiv 5, 7 \pmod {12} \end{cases}$$  where $\left(\frac 3p\right)$ is Legendre symbol  I have done this for $\left(\frac {-3}p\right)$ and reach $\left(\frac 3p\right) = 1$ if $p=1$ and $\left(\frac 3p\right)= -1$ if $p=2$. in the case where $p=1$ the next step was to see that $p=3k+1=6l+1$ so then $p=12j+1$ and $p=12j+11$ give $\left(\frac {-3}p\right)=1$.   I'm very confused about all of this so if someone could help it'd be greatly appreciated. it would probably be better to start from the beginning with $\left(\frac 3p\right)$ or to  use the same logic used to find $\left(\frac 2p\right)$ and Gauss lemma

$(\frac 3p)$ is the Legendre symbol here, not a fraction, if that wasn't clear.  This is what I have so far:  We know by Gauss's Lemma that $(\frac qp) = (-1)^v$ where $$v = \#\left\{1 \le a \le \frac{p-1}{2} \mid aq \equiv k_a \pmod{12}),\space -p/2 < k_a < 0\right\}$$  And we also know that multiples of $(\dfrac{p-1}{2}) \times 3$ must be between $0$ and $p/2$, between $p/2$ and $p$, or between $p$ and $3p/2$.   Representing $p$ as $12k + r$ seems like the next step, but I'm not sure where to go from there.


The answer might be so trivial; nonetheless, I was wondering in the function composition such as:  $k = f \circ g \circ s$,  k is called the composed functions. What is the terminology to refer to f, g, and s?

What do you call the functions that make a composite function.  Example : $e^{\sin x} $ is made up of $\sin x$ in the argument of $e^x$  So what are $\sin x$ and $e^x$ called here in this context? Basic functions or something?   (Please don't tell me the former is trig and latter is exponential function, I know that, but that's not what I'm asking here, please try to understand)  Hope I made myself clear.


If  a   microphone  has an  output  voltage of  1.45mV  @   1   Pa  and a   microphone  preamplifier    adds    50dB    of  gain,   what    would   the voltage at  the output  of  the mic pre be, assuming    the pressure    applied to  the diaphragm   never   changes?

Microphone  spec    sheets  specify a   microphone’s    sensitivity by  displaying  the voltage at  the output  of  the microphone  when    1   Pa  is  applied to  the diaphragm.      If  a   microphone  has an  output  voltage of  2.5mV   @   1Pa,    what    would   its output  voltage be  when    98dB    SPL is  applied to  the diaphragm?


I'm looking to read a textbook or a work about graphic design or typography that is considered to be essential or the best for its field, and in particular, I would like one that is somewhat old and has stood the test of time.  It could be either technicalities of design or philosophy of design or something else, but it needs to teach concepts that can be applied timelessly; If the book covers the ins and outs of Adobe Photoshop or Illustrator and how to use the software, that isn't helpful to me.  I would like a book that teaches a way of thinking that can be applied no matter what the software or hardware used, as a good designer needs only their mind to produce a piece of art.  An example of what I'm looking for is a book from the field of programming: SICP. This is an ideal example as it has withstood decades of use and is still relevant today because it teaches concepts rather than the nitty-gritty details of the language used.    This is not a subjective question, I am asking for a specific type of book and not your favourite book. Any recommendations would preferably be written by a reputable graphic designer, professor, or have been used in a college course.  Thanks!

What is the single most influential book every designer should read?


I have a 2012 iMac running Catalina and I'd like to use it as a secondary display to my MacBook Pro. I connected the two computers via a USB cable and hit both ⌘ CommandF2 and then tried ⌘ CommandFnF2. It's not working. Do I need to use a Thunderbolt? Any input/advice would be most appreciated.

I have a Surface Pro 4 and an iMac (late 2019). I would like to connect my Surface Pro to the iMac to use the iMac screen as a second monitor.  Is that possible?  What are the requirements to use an iMac as a second screen?


What is ~ means in Linux how it works?    cd ~/   I am using it with CD command, but don't know how it is working.

I'm only new to using SSH, but when I log in I end up in the directory ~, which in general is the same directory when FTPing in. I can still go to /, but I don't know what the ~ means. Home? Where is it in relation to /, or how could I find out?


I have a pretty beefy graphics card with 4GB of memory etc. But I can see the YouTube videos stutter sometimes and have a poor framerate (although none get dropped).  I feel like with a decent graphics card this shouldn't happen. Is there a way to make sure the gpu I have works properly?  Edit: I'm confident, that the internet connection is not the problem, since the "video stats for nerds" of the videos I am looking at show 0 dropped frames and perfect buffer health.  Edit2: XUbuntu 16.04  $ lshw *-display              Beschreibung: VGA compatible controller              Produkt: NVIDIA Corporation              Hersteller: NVIDIA Corporation              Physische ID: 0              Bus-Informationen: pci@0000:65:00.0              Version: a1              Breite: 64 bits              Takt: 33MHz              Fähigkeiten: pm msi pciexpress vga_controller bus_master cap_list rom              Konfiguration: driver=nouveau latency=0              Ressourcen: irq:43 memory:d7000000-d7ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:b000(Größe=128) memory:c0000-dffff

Is there a benchmark tool to measure computer performance for Ubuntu like SuperPI, 3DMark, or PCMark?


I am trying to summon an arrow of instant damage 2 in Minecraft bedrock edition, and I cannot figure a way to do it. Is it possible to do this in bedrock? If so, how?

This question was recently split into different questions for each workaround. See   meta posts for more information.   Can you use NBT tags in commands? I’ve tried commands that normally work in Java Edition like: give @s minecraft:planks 30 1 {display:{Lore:["Wooden planks"]}} give @s stone_pickaxe{Unbreakable:1b} give @s item_frame{EntityTag:{Invisible:1b}} summon villager ~ ~ ~ {Offers:{Recipes:[{buy:{id:"emerald",Count:5b},sell:{id:"diamond_sword"}}]}} summon tnt ~ ~ ~ {Fuse:20s}


I have a string similar to ../../sdd1 and trying to match sdd from here. I'm trying to use the following sed command:  echo "../../sdd1" | sed 's:.*\([a-z]\{3\}\)[0-9]?:\1:'    and it does not produce a match. But when I use   echo "../../sdd1" | sed 's:.*\([a-z]\{3\}\)[0-9]\{0,1\}:\1:'   then I get my match, sdd.  My best guess is that I should escape the ? as well, similar to the curly brackets - I tried it and it works, but I don't know why.  So the question is, why does the [0-9]? regex not match the 1 from sdd1, or why do we have to escape the ? and the curly brackets?

I wrote a regular expression which works well in a certain program (grep, sed, awk, perl, python, ruby, ksh, bash, zsh, find, emacs, vi, vim, gedit, …). But when I use it in a different program (or on a different unix variant), it stops matching. Why?


Does anyone have style sheets for the shapefile extracts of OpenStreetMap? The layers which are downloaded "Lines" "Multilinestrings" "Points" "Multipolygons" all have attributes associated to them and someone must have dedicated some time towards creating very pretty styles, especially when being open source.  relating to this question direct me to sites with .qml style files although they apply to layers which do not correspond to the more modern shapefiles downloaded from OSM.     I ended up just styling it under my own steam, check it out!

I'm looking for a qml file (or equivalent e.g. sld) to allow me to use QGIS to take OpenStreetMap data and produce paper maps. I'm re-asking this question (it was asked once or twice over a couple of years by other people) because I'm really surprised not to easily find such a thing already (I looked hard).   I have found  - which are good, but only style basic data like roads (and do so simply). I've successfully followed the  for getting OSM data to work with. I've carried out some basic style editing successfully. I realise I could create my own styles for this purpose - but this seems like a very big job. I want a visually pleasing map taking into account most of the data available on OSM (i.e. not just streets, but tracks, paths, rivers, woods, lakes, buildings and so on). I'd have thought that there would be other people out there already doing the same... It seems odd to have to re-invent the wheel when both OSM and QGIS are open source / open data projects. I feel like maybe I've just missed the obvious repository of OSM qml files which resides out there on the internet somewhere if you know where to look.  Additional notes in response to query below...  Ideally I'm looking for a Mapnik style rendering of the OSM data, but any equivalent properly developed and complete style would be good.  At the moment the objective is to use this data to produce paper mapping, but simple use of the mapping as base data on which other geographic data can be displayed also requires a decent rendering. At work I use Ordnance Survey data completely styled to produce a full and very detailed UK map (the point being that I didn't have to design this styling, it came with the data). I realise that other tools exist for paper mapping, but the same issues tend to arise at one stage or another... I'm more or less successful in making the tool work for me in really basic terms, but to get to something visually useful I end up back with me either needing to re-invent a complete rendering style from scratch (beyond my skill), or encountering such a complex set of requirements for database setups or whatever that the process crashes and burns before I get anywhere useful. With a few more years of GIS experience I'll maybe be a database, CartoCSS (or whatever else) wizz... but until then I'm prevented from using the amazing resource that OSM provides by this one barrier.  Update (July 2015): Please note that I'm still looking for information on this, and given that I've just been informed that the question has had 2500 views in the last year clearly others are too.


find all continous functions$$f(f(x+y))=f(x)+f(y)$$  My try:setting $y=0$ $$f(f(x))=f(x)+k$$ where $k=f(0)$ hence:let $f(x)=t$,$$f(t)=t+k$$ alternatively:$$f(x)=x+C$$ My question:1)Have i got all solutions?I think i am missing a generalised one. 2)does the word continous mean any thing important. I mean if they had not mentioned will there be more functions?

The question is from :     Find all continuous functions $f:\mathbb R\to \mathbb R$ such that for any real $x$ and $y$,   $$f(f(x+y))=f(x)+f(y).$$   I'm totally new to functional equations so please correct me if I make a mistake.   I try plugging in simple functions and I find that $f(x)=0$ and $f(x)=x+c$ for some $c \in \mathbb R$ works.  Then I believe the next step is to derive $f(x)=x+c$ as a solution.  Let $y=0$. Then we have  \begin{align} f(f(x))=f(x)+f(0) \end{align}  Then we can make the substitution $u=f(x)$, which produces  $$f(u)=u+c$$  since $f(0)$ is just a constant.   Hence the solutions are $f(x)=0$ and $f(x)=x+c$ for some $c \in \mathbb R$. $\Box$    Is this a valid answer? As some of you may know the AMO is happening in a few days and I would appreciate any help in improving the quality of my answers.


I am trying to set an NSDate from a string. The format of the string looks like this (RFC 2822):  Tue, 09 Jun 2015 06:09:38 +0000   The code I am using is:  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier: @"en_US_POSIX"]; dateFormatter.dateFormat = @"EEE, dd MMM yyyy hh:mm:ss Z"; NSDate *dateString = [dateFormatter dateFromString:self.time];   But dateString always returns a nil. self.time definitely contains the string for the time.

How do I convert, NSDate to NSString so that only the year in @"yyyy" format is output to the string?


In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles $ABC$ and $DEF$ such that $AB = DE$, $BC = EF$, and $\angle A = \angle D$, then we cannot deduce that $ABC$ and $DEF$ are congruent.  However, there are a few special cases in which SSA "works". That is, suppose $ABC$ is a triangle. Let $AB = x$, $BC = y$, and $\angle A = \theta$. For some values of $x$, $y$, and $\theta$, we can uniquely determine the third side, $AC$.  (a) Use the Law of Cosines to derive a quadratic equation in $AC$.  (b) Use the quadratic polynomial you found in part (a) in order to find conditions on $x, y,$ and $\theta$ which guarantee that the side $AC$ is uniquely determined.  I have solved part (a) and gotten $z^2-2xz\cos (\theta) + (x^2-y^2)=0$.  I don't quite get part (b). It is obvious $90^{\circ}$ is a solution but do I have to prove that this is right? Or do I need to prove that this is the only solution? Or is there other answers?  My work: All I know is that the discriminant would be $4x^2z^2\cos^2 \theta-4(-x^2+y^2)$  P.S. My answer for part(a) is correct, right?


With the kind assistance of X11 Quartz background app I have an X11 app Dia diagramming tool running.    It is enticing to see those mnemonics apparently (?) available to use. I have a serious beef with macOS for not helping those of us who are keyboardists to have an option to work in that manner.   So, is it possible to access those mnemonics? I have tried various combinations of Option, Control, Control + Option, with/without Command plus the given letter.

I'm using an editor that requires X11 and for the most part it works well. I have many commands that use the Alt key and I like to navigate the menus this way as well, but the Alt key doesn't work through X11.   I found  on configuring the Alt key for X11 applications, but it didn't work for me. Any other ideas?


After some changes (I do not remember what I change) my system (lubuntu) does not automatically boot in graphical mode. After system start I have to log in (in text mode) and after that type "sudo startx" command graphical interface starts.  I would be grateful if somebody could help me deal with that problem.  Best regards,  patlas

I upgrade my Ubuntu to 11.10. I restarted and it worked perfectly until now when I restarted again and it is now in text mode after I login. Can somebody please provided some suggestions on what I should do? I do not understand what happened.    I tried restarting lightdm but it is already running.


On occasion I will accidentally click the downvote button in an exchange I don't have 125 reputation on. As the pop-up says, nothing public happens, but the downvote is still recorded. Is there a way to "unrecord" the downvote? I've been upvoting then removing my upvote in the hopes an upvote still clears a downvote for sub-125 users, but I have no idea if this is actually working. Do recorded downvotes from sub-125 users even matter?

Anonymous and unregistered users with < 15 reputation (the amount required to earn the upvote privilege) will now see       feedback   on every post in the area that a logged in user would see "add comment":    When the post area is moused over, the area expands to:     Was this post useful to you? [Yes] [No]     once clicked it will say     sending feedback...   and eventually     Thank you for your feedback.   The goal is to offer the 90% of our traffic that is anonymous users a way to provide more meaningful feedback on posts rather than passively incrementing a view counter.  This click data is currently being evaluated to see what we can do with it. Ideas welcome!


Is there any way for me to see who is upvoting or downvoting me? Apart from looking at the data dump, of course.  No, I will not go after those who downvoted me, but it's interesting to know, anyway.

Is there a way to see who voted (upvotes and/or downvotes) on your answers and/or questions?


My native language is Dutch. We have a subtle, but useful way of combining the ingredients: Prefix (+ comma) + and + Prefix + stem. However, I do not know whether the same rules apply in the English language, e.g.:   "Copper-, and iron-based materials" This means two or more materials. One or more based on copper, and at least another one based on steel, or vice versa.  "Copper- and iron-based materials" This indicates multiple materials composed of copper and iron.  Thus the comma makes the difference. Furthermore, the hyphen is necessary. And last but not least: "copper-based materials and iron-based materials" does not make useful use of the rules of language.  So what are the rules?  Thank you,   Max

If multiple hyphenated terms share the same latter half, and I wish to list them without repeating that latter half, how should the hyphens be placed?  For example:     I will be investigating control issues in ground-based, water-based, and air-based robots.   If I do not want to repeat based, could I write:     I will be investigating control issues in ground-, water-, and air-based robots.   Is it correct to just leave a hyphen dangling after ground and water?  If not, how should it be written? I know the original sentence doesn't sound too bad, but I really just want to know the punctuation rule (or the convention in American English if there is no rule).


I've got problem using drush on shared host.  drush status shows:     Drush version          :  8.0-dev   and when I run:     drush php-eval "phpinfo()" | grep memory   It reporsts:     memory_limit => 1024M => 1024M   Which is quite big  But whenever I run drush cc all (this is D7 site) it  with:     Fatal error: Out of memory (allocated 61341696) (tried to allocate 79 bytes) in .../public_html/includes/registry.inc on line 41   I created drush.ini file in .drush directory and whatever I put there is reported by drush and drush status shows fail as loaded but memory limit does not go away.  Is it possible this error to come from drush version or what else could I ask hosting provider to change or check?  Edit:  When I add drush.ini file  in .drush directory with following in it:  memory_limit = 256M   and drush status   PHP executable         :  /usr/local/php56/bin/php-cli     PHP configuration      :  /usr/local/php56/lib/php.ini                               /home/tennist/.drush/drush.ini   PHP OS                 :  Linux                            Drush script           :  /chroot/drush/drush.php          Drush version          :  8.0-dev                          Drush temp directory   :  /tmp                             Drush configuration    :                                   Drush alias files      :   In /usr/local/php56/lib/php.ini  memory_limit = 1024M  In /home/tesnnist/.drush/drush.ini memory_limit = 256M  the command drush php-eval "phpinfo()" | grep memory reports:    [2] => --php-options=-d memory_limit="256M"  And after this drush cc all also fails when reaching 62M limit.

I want to specify additional php.ini settings to a drush invocation in the manner they would passed using -d option if drush was a php script that could be passed to PHP using the -f parameter.  On looking at drush  shell script - /usr/bin/drush - I see that it executes the drush.php script in that manner.  Is there a way to add more of those through the command line?


I am practicing XHTML with JavaScript. I want the cost to be in two decimal places, just like how we calculate money in real life. How would I do that? This is my code in the JavaScript file:  function computeCost() {     var french = document.getElementById("french").value;     var hazlenut = document.getElementById("hazlenut").value;     var colombian = document.getElementById("colombian").value;     var regular = document.getElementById("regular").value;  //Compute the cost     document.getElementById("cost").value =     totatCost = french * 3.49 + hazlenut * 3.95 + colombian * 4.59              + regular * 1.99; } // end computeCost

I would like to format a price in JavaScript. I'd like a function which takes a float as an argument and returns a string formatted like this: "$ 2,500.00"  What's the best way to do this?


If I visit this site using "Communities" menu or by by visiting  then I see this set of buttons:    There is no "Newest" question tab.  To have "Newest" I have to click burger menu (the leftmost button on top with 3 vertical lines), choose "Questions", then I am at  and buttons become:    Only then I am able to enjoy the site the way I like (and I like to see newest questions as one can guess, not old ones, not featured, not active, not bugs, not reqs, not hot, not week, not month.. shall I continue?)  I noticed this on Arquade .  I am not sure, but I think it was changed with when new UI comes. Is there an easy way to make me happy? Clicking every time burger menu (3 clicks instead of just one) is quite annoying as you can guess. I would enjoy even more if "Newest" was default mode, but someone decided it should be "Active".

Currently, if you go to any site SE site, you're met with 5 tabs: Active, Featured, Hot, Week, Month. However, if you break it down by specific tags, you get a new tab: Newest. Can we get this tab on the default page as well? It's really disconcerting when you visit an SE site, and see a question at the top of the page, only to realize the reason it's there is because it was edited to have tags removed.  Default:   Tag:


If I start play with three levels of Sorcerer (allowing me four spells), must I choose spells as if I began at level 1, or can I choose any four spells?  If I began at first level, I would have two level 1 spells. Per level up, I can forget one spell and learn a new one. Since level 3 is the first time the Sorc can get 2nd level spells, I can only have two level 1 spells and two level 2 spells.  But beginning with three Sorc levels right away, if allowed to choose any four spells, I would be able to choose four level 2 spells and no level 1 spells.  I realize this isn't optimal since there are only two level 2 slots at level 3, but this could be useful, if not without its drawbacks, in the case of a multiclassed Sorc. Anyway, any rules that can be quoted to support your answer would be great, but any reasoning to support either case would be good as well.

It's not clear to me how to choose Spells Known when creating a new character at a higher level.  Let's take the Bard as a working example first:  Bard level 2:   Spells Known: 5 Slots per Spell level: 1st × 3   Bard level 3:   Spells Known: 6 Slots per Spell level: 1st × 4, 2nd × 2   I'm interpreting this to mean that, if an existing 2nd-level Bard gains a new level (level 3), he's gaining 1 (one) new spell known. He can then choose the new spell known to be either 1st or 2nd, correct?  What I don't understand then, is the case of creating a new character starting at a higher level; say, creating a new Bard at level 3.  In that case you're forced to choose 6 spells, which must be from the list of 1st- and 2nd-level spells, correct?  When making this 3rd-level Bard from scratch, though, can I select 2nd level spells for all 6 spells known?  As another example, say you're creating a very high level Bard from scratch, starting at level 15. The book says your Spells Known is 19, and your spell slots are 1st × 4, 2nd × 3, 3rd × 3, 4th × 3, 5th × 2, 6th × 1, 7th × 1, and 8th × 1.  So, for those 19 Spells Known, you can choose any spells from 1st through 8th spell level. Am I free then to select as many spells as I can at 8th spell level (5 in number), working backwards, and in the end ignoring the 1st, 2nd, 3rd level spells entirely?  As another example, the Ranger doesn't know any spells at 1st level, nor have any spell slots, but the book says “You know two 1st-level spells of your choice from the ranger spell list.” Does it mean at 2nd level and above?  Long story short: When choosing Spells Known for a spellcasting character created above 1st level, am I allowed to choose my Spells Known at whatever spell level I like, just so long as I have at least one spell slot of that level?  I'm working on a D&D 5e character generator and need to clarify this.


I'm trying to make a class that queue's up functions to run after a certain amount of time has passed. The class will take a pointer of an address, a pointer to the object of that member function, and also allow up to (currently) a single parameter.  The code that errors:  cfs.taskManager.addTask(500, &GameState::print, cfs.getCurrentState(), temp); //500: (int) time in ms converted later. //&GameState::print: void GameState::print(std::string), takes a string argument. // cfs.getCurrentState(): returns pointer to print object. //temp: std::string   TaskManager.hpp:  class TaskManager { public:     TaskManager();     ~TaskManager();      // float ms: time in milliseconds before event occurs.     // void(C::*f)(): direct pointer to function.     // C* o: direct pointer to object that the function is attached onto.     // A a: Data type copy of spare argument.     template <typename C, typename A>     void addTask(int ms, void(C::*func)(A), C* o, A a);        //  Dump all queued tasks.     void clearTasks();     //  Check if program time has passed currTime+delay of the      void run();      std::vector<Task> task;     sf::Time time; };   This line here from above  void addTask(int ms, void(C::*func)(A), C* o, A a);   I'm led to believe that trying to pass an argument into the function pointer is the issue. I tried to make void(C::*func)(A) expect the same type of data as last parameter. When I remove template A and stop trying to pass an argument, I get no compilation errors.  Here's the compilation error I get:  error LNK2001: unresolved external symbol "public: void __thiscall TaskManager::addTask<class GameState,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >(int,void (__thiscall GameState::*)(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >),class GameState *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (??$addTask@VGameState@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@TaskManager@@QAEXHP8GameState@@AEXV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@ZPAV1@0@Z)1  >C:\Users\Honor\documents\visual studio 2015\Projects\CFS\Release\CFS.exe : fatal error LNK1120: 1 unresolved externals   Any help at all would be very appreciated!  Edit: If I'm leaving out any crucial information, let me know I'll update really fast.

Quote from :     The only portable way of using templates at the moment is to implement them in header files by using inline functions.   Why is this?  (Clarification: header files are not the only portable solution. But they are the most convenient portable solution.)


I know there are so many repeated questions in stack but i didn't found any help, so please help me. Email should be like this,  "abc@abc.com;abc@abc.com; abc@abc.com ; abc@abc.com ;abc@abc.com;"   I also need code for validating this email string  I found this one but it is looking like incomplete   Thanks In advance

Over the years I have slowly developed a  that validates MOST email addresses correctly, assuming they don't use an IP address as the server part.  I use it in several PHP programs, and it works most of the time.  However, from time to time I get contacted by someone that is having trouble with a site that uses it, and I end up having to make some adjustment (most recently I realized that I wasn't allowing 4-character TLDs).  What is the best regular expression you have or have seen for validating emails?  I've seen several solutions that use functions that use several shorter expressions, but I'd rather have one long complex expression in a simple function instead of several short expression in a more complex function.


I know how to change the DNS of my network from GUI :   Right click on the network manager icon in the panel and choose "Edit connections..." Select your connection from the wired or wireless tab, choose "Edit" Choose IPv4 settings tab Switch method to "Automatic (DHCP) addresses only" Enter the DNS you want in the box "Additional DNS servers" and press "Apply"   How do I do exactly the same thing from Terminal?

According to  it appears to be simple. However, /etc/bind does not exist on the default installation of Ubuntu 12.04.3 LTS server.  So, without installing any further software, how can configure DNS and remove dnsmasq on ubuntu server? I am quite familiar with sudo & nano.


What I want to do is to write a program which first tells you to type a number (let's say 4), and then it tells you to name 4 capital cities in the world . In order to do that, I need to use "for i in range" function, right?. But after for i in range, how can I have all those names printed on the same line? I'm using python 3.4.4  Here's an attempt:

I'd like to do it in Python. What I'd like to do in this example in C: #include <stdio.h>  int main() {     int i;     for (i=0; i<10; i++) printf(".");     return 0; }  Output: ..........  In Python: >>> for i in range(10): print('.') . . . . . . . . . . >>> print('.', '.', '.', '.', '.', '.', '.', '.', '.', '.') . . . . . . . . . .  In Python print will add a \n or space, how can I avoid that? Now, it's just an example, don't tell me I can first build a string then print it. I'd like to know how to "append" strings to stdout.


First of all sorry if this question seams repeated I am a rookie, I tried many links but not able to do that is not working in my case. On my laptop currently Windows 7 is installed and I want to install Ubuntu alongside it, but I am not getting that option in my Ubuntu to [install alongside of it] menu. I tried to select "Something else" option but I don't know how to  partition it. It is my Windows 7 disk image screen shot    And this is screen shot for Ubuntu GPart

Whenever I startup from the LinuxLive USB, and try to install Ubuntu 12.04, it only gives me two options instead of the usual 3 or 4. My options are "Replace Windows 7 with Ubuntu" and "Something Else". Whenever I go into "Something else", it looks extremely confusing. How do I install it side-by-side while using the "Something else" section? These are my partitions.   /dev/sda /dev/sda1 ntfs (104Mb, System Required Partition) /dev/sda2 ntfs (1000097Mb, Windows 7 Partition)   Or should I try reinstalling my installer on a CD rather than USB and maybe then it will have the "Install alongside" function?


I got this message when trying to update nodejs and nodejs-dev (with --with-new-pkgs option) in Ubuntu 18.04.   The following packages have unmet dependencies:  libssl-dev : Conflicts: libssl1.0-dev but 1.0.2n-1ubuntu5.1 is going to be installed               Recommends: libssl-doc but it is not going to be installed  libssl1.0-dev : Conflicts: libssl-dev but 1.1.0g-2ubuntu4.1 is going to be installed E: Broken packages

After upgrading from 10.04 to 12.04 I am trying to install different packages.  For instance ia32-libs and skype (4.0).  When trying to install these, I am getting the 'Unable to correct problems, you have held broken packages' error message.   Output of commands:  sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.   After running this:  sudo dpkg --configure -a foo@foo:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.


I have an SSD of 250GB, and in the Storage view of about this Mac it's write I have close to 90GB of apps, when clearly the applications folder is only 18GB. I can hardly believe that system applications and background apps take up nearly 75GB of space ?   Where do the 75GB comes from?

Every few days I get notices on my MacBook that it's running or run out of hard drive space. Curiously, restarting the computer will enable me to recover gigabytes of space (this past time, it was able to recover about 2.2GB). However, I can't identify anything in my personal activity that consumed that space.  It's possible that it's a rogue iTunes podcast or a huge software update that my Mac is automatically downloading - would either of these reclaim the space upon a restart?  One possibility that I can think of is that FileVault has some sort of disk leak, allocating but not freeing files. Does this make sense? Is there a tool that I can run to determine where this space is going? Assuming it is FileVault, should I try to disable it? What's the best way to turn of FileVault on a nearly full computer?


I have xml files to replace info between tags . It works when my xml file have body like this:  <VARIABLES>test</VARIABLES>   Problem starts when it is like that:  <VARIABLES>test test test </VARIABLES>   My pattern didn't see it at all:  string newText = Regex.Replace(content, "(?<=<VARIABLES>).+?(?=</VARIABLES>)", replaceWithText);

For example, this regex  (.*)<FooBar>   will match:  abcde<FooBar>   But how do I get it to match across multiple lines?  abcde fghij<FooBar>


I will be flying in to Rome 3 days ahead of my cruise sailing date which sails out of Rome for an 11 day cruise of Greek isles (including 3 port days in Turkey), finally disembarking in Athens.  I will also be staying an extra 3 days in Athens before flying out of Athens to go home.  Where should I apply for a Schengen visa, at the Greek embassy or at the Italian embassy? What happens if I apply to the wrong embassy?

My wife was just issued a multiple entry visa by France, which is good for one year.  Our first trip will be to France, the issuing country.  My question is: after we leave the EU and return, must future trips also start in France? Or may we go directly to (say) Greece from the US on a later visit?


When I run my program using JsoupPath, there is an exception: Exception in thread "main" java.lang.NoClassDefFoundError: org/antlr/v4/runtime/CharStream   And I open the file of JXDocument.java where the exception come from. I found the some import statements are red:  How could I resolve this exception?

I am getting a NoClassDefFoundError when I run my Java application.  What is typically the cause of this?


I have a list which stores new user requests. In the form, there are fields for the wanted Operating system and the type (Notebook or Desktop). These are stored in the list and are radio buttons.  However, I have another list with all the models. This list has the columns "Name" (i.e. Lenovo T510), "Type" (Notebook or Desktop) and "OS" (Windows or Mac).   What I like to have is a dropdown menu showing the models. However, it should only show the models which are based on the selection of the user. So if the user chooses a Windows Notebook, the dropdown should only show the list entrys where "Type" is Notebook and "OS" is Windows.  I hope it is clear what I want to accomplish. Is there a way to do it? I have access to SharePoint Designer and jQuery to get this job done, so this isn't a problem. However, I like to solve this with as much default settings from SharePoint as possible.  This is in SharePoint 2013.  Thank you.

I am new to SharePoint 2013. What I need to figure out is based on the following situation. I have several school districts with multiple schools within the school district. I would like to create a cascading dropdown that 1st lists the districts and then will automatically populate a list of schools within a particular district when the district is selected. Can someone tell me if this is possible and if so what steps do I take to achieve it?    Thank you!


I'm sure I'm missing something. Can anyone guide me in the right direction?  Thanks for your time.

Let $f$ be $f\in C([0,\infty ])$, such that $\lim_{x \to \infty} f(x) = L $.  Calculate  $$ \int _{0}^\infty \frac{f(x)-f(2x)}{x}dx $$  Help?


In the context of understanding Borel-Cantelli lemmas, I have come across the expression for a sequence of events $\{E_n\}$:  $$\bigcap_{n=1}^\infty \bigcup_{k\geq n}^\infty E_k$$  following . This is verbalized as:   Limit supremum of the sequence of events when $n\rightarrow\infty$: $\limsup\limits_{\small n\rightarrow\infty}E_n$. The event that occurs "infinitely often": $\{E_n \,\text{i.o.}\}$ or the set that belongs to "infinitely many" $E_n$'s.   The explanation is that $\displaystyle\bigcup_{k\geq n}^\infty E_k$ is the event that at least one of the $E_n,E_{n+1},E_{n+2,\cdots}$ events occurs.  The question is about the meaning of $\displaystyle\bigcap_{n=1}^\infty $ in front.   The way I look at it is that it would play the role of excluding every $\{E_n\}$ imaginable with $n\in\mathbb N$. For instance, when $n=1$, the union part of the expression would render: $\{E_1,E_2,E_3,\cdots\}$; and when $n=2$, this same union operation would yield: $\{E_2,E_3,\cdots\}$. So the intersection in front of the expression would eliminate $\{E_1\}$ and leave the rest. Next would come the intersection with $\{E_3,E_4,\cdots\}$, excluding $\{E_2\}$. Doing this exercise at infinity would manage to exclude every single $\{E_n\}$.  Is this what the intersection/union operation is supposed to do: "clip" out every single set? My understanding is that this is not the case, and that we want to end up with a "tail" of events after point $k$.  What is the correct interpretation, and what is the mistake I am making?  NOTE to self: It is not about the "clipped out" sets at the beginning, but rather about the tail events. The union part indicates that any of the events after event $n$ occurs, defining the "$n$-th tail event." The intersection is defines the event that all the $n$-th tail events occur.

I am starting to learn about the liminf and limsup of a sequence of sets. However, I do not understand the very basics, such as why $\lim\sup A_n=\bigcap_{n\in N}\bigcup_{k>n} A_k,$ and why $\lim\sup A_n=\bigcup_{n\in N}\bigcap_{k>n}A_k.$ Can someone break these definitions down for me?  Also, why is $\lim\inf\subseteq\lim\sup$?


Does there exist a proper subfield of $\mathbb{R}$ whose algebraic closure is $\mathbb{C}$ ?   A weaker question: Does there exist a proper subfield $F$ of $\mathbb{R}$ such that $\mathbb{R}$ is algebraic over $F$?

Is there a (proper) subfield $K$ of $\mathbb{R}$ such that $\mathbb{R}$ is an algebraic extension of $K$?  From this question, , it is clear that for such an $K$, $[\mathbb{R}:K]=\infty$.  This question seems to be non-trivial, and I suspect any existence result will be non-constructive. Any references will be appreciated.


I need help with this code  It is my first time using latex   \documentclass[10pt]{article} \usepackage{tikz} \usetikzlibrary{calc} \usepackage{graphicx} \usepackage{listings} \usepackage{pgfplots} \usepackage{calc} \usepackage{pdfpages} \usepackage{circuitikz}  \begin{document} \begin{figure}[h] \begin{minipage}[r]{0.49\textwidth} \centering \begin{tikzpicture}[scale=0.8] \begin{axis}[grid=magor, grid style={smooth}, xmin=0,xmax=3, xlabel=$t$, ylabel={$x(t),y(t)$}, variable=t] \addplot[blue,line width=1,smooth]plot [domain=0:3.5,samples=350]expression{(1+2t)exp(-2t)\sin(200t 3.14)}; \addplot[red,line width=1,smooth,style={dashed}]plot [domain=0:3.5,samples=150]expression{(1+2t)exp(-2t)}; \addplot[red,line width=1,smooth,style={dashed}]plot [domain=0:3.5,samples=150]expression{-(1+2t)exp(-2t)}; \end{axis} \end{tikzpicture} \caption{Damping sinusne funkcije} \label{damping} \end{minipage} \end{figure} \end{document}

I have to draw function with \plot but it says "Dimension too large", this is my code:   \begin{tikzpicture}  \begin{axis}[grid=major, xmin=0, xmax=3, ymin=-1.5, ymax=1.5, xlabel=$t$, ylabel=$x(t), y(t)$, scale=0.3]  \plot[blue] plot[samples=100, smooth] expression{(1 + 2 * x)*exp(-2*x) * sin(280* 3.14 * x)};  \plot[red, dashed] plot[samples=100, smooth] expression{ (1+2*x) * exp(-2*x)};  \end{axis} \end{tikzpicture}   Hope you can help me because I need it in few days, there are picture how it should look:    and this are functions:


A friend asked me to develop a logo for his wife's hair salon. Originally I worked with just text, but she said she definitely wanted scissors as part of the logo, so I built in the the H + D (hair daun) in to the scissors but originally mirrored so that when the girls has the logo on their uniforms, the logo would then appear correctly. So we went for the normal look.  Today, however, a local business in their hometown has told them that I have stolen the logo from his site, made a few minor adjustments to make it appear as if it is a custom logo.   I had no idea the company existed until an hour ago, and I am really confused as to where the comparison has come from.  My Logo       Supposed Stolen Logo

Note: This is a canonical post created so that we can close the many similar questions as duplicates as discussed in .   We have created a logo for a client and they love it. We've already started preparing the materials that will feature the new logo.   However, after we had created the logo, we found a logo for another company that looks eerily similar. We did not intentionally create the new logo to look like the one of the other company, in fact we didn't even know it existed beforehand, but it does regardless.  What should we do? Is this plagiarism? Can our client use the logo we have created? Should they? Or do we need to come up with another logo that's more different?


So I have my table  \begin{table} \center \begin{tabular}{| l | l | l | l |}\hline table stuff \end{tabular} \caption{Lots of words about table} \end{table}   I want it so that the caption fits to the table, kind of the same as changing the indents in Word.  Is there a way to do this?  Additionally, I have something similar to:  \newpage \subsection{NAme} TABLE STUFF INCLUDED ABOVE \subsubsection{Name}   And the table appears at the top of the page, not in between the title of the subsection and the sub subsection.  Can I change this?

HI   How can I start the caption where table starts or figure starts?   \captionsetup{justification=justified, singlelinecheck=false}   does not work for me because it places the caption at the beginning of the paragraph not the beginning of the table.  Thanks!!


I have been cracking my fingers for 2-3 years and on the first year I was told that I'm going to get arthritis because of it.  I've been researching this since the first year and I've never gotten an answer. Most people say either Yes, No or I don't know.  Arthritis is mainly cause by bones rubbing together and cracking fingers is just air sockets poping.  I've asked my biology teacher and he said that he's not sure. He then explained to me that the cracking sound from people cracking their fingers is just air sockets poping.  So can finger cracking cause arthritus?

What causes the noise when you crack a joint? Is joint cracking harmful?


Find   $$\lim _{n \to \infty}   \int_0 ^ {1} \left(\frac { 2nx^{n-1}}{1+x}\right) \mathrm{d}x$$   How to find it? The sequence of function is certainly not uniformly convergent. Should I do it in brute force manner?

Let $s_n$ be a sequence defined as given below for $n \geq 1$. Then find out $\lim\limits_{n \to \infty} s_n$.   \begin{align}   s_n = \int\limits_0^1 \frac{nx^{n-1}}{1+x} dx  \end{align}  I have written a solution of my own, but I would like to know it is completely correct, and also I would like if people post more alternative solutions.


I am Trying to disable the top-left activities hot corner but after a lock-unlock, it gets enabled again.  So, the question is not how to disable it. I know how to do it via Tweaks tool as well as the command-line. The question is about how to disable it, and ensure that it stays disabled because it basically is kind of annoying.

GNOME shell has the so-called feature "hot corner", that opens the dashboard  if the mouse touches the top-left corner of a monitor screen.  I want this disabled I used to have a GNOME shell extension, yet the repository is not found anymore:  git clone git@github.com/Ahrak/gnome-shell-extension-disable-hot-corners.git fatal: repository 'git@github.com/Ahrak/gnome-shell-extension-disable-hot-corners.git' does not exist


How come pathfinder - minus front is not working? I want a stylized N where that white part is taken out

How do I achieve this effect where that small part in "N" is taken out? I can use Sketch, Illustrator, Photoshop.  I can apply divide effect fine...    BUT when i start deleting the white block, this is what i see...      I wonder if that's b/c I added stroke to the text....?  How to fix it???


When crew members of the Prometheus land on a new planet, they are wearing eco-suits that isolate themselves from the outside atmosphere.   But ten years later, when crew members of the Covenant land on a new planet, they are not.  This is illogical as people are aware of the potential danger when exploring a new planet, let alone the Prometheus' unexplained disappearance.

In the beginning of the Alien: Covenant movie, a group of colonists from the main ship make a landing on an unknown planet, which they found out accidentally after ship has been bombarded by an unknown wave from a star collapse and what bothers me, is that they don't wear any spacesuits, any protective gear, any air filter systems, just nothing.  Is that really the way future space expeditions gonna explore new possible planets presumed as possible habitable homes for humanity?  Every 5th grader knows, from the biology school lessons, that water, air, and even earth itself contains and gives life to a thousands of viruses, bacteria, and microorganisms.  You can breathe in bacteria, or virus, and be dead in a seconds.  Do film makers really suppose we will take it as realistic depiction of extraterrestrial expedition?   Reality check just screams out loud.  What do you think can be their motivation for such a decision?


I just recently installed Ubuntu 14.04 in both my Laptop and Desktop Windows 7 computers.  Now if I walk away from my work for a few minutes, I'm logged out.  At times the screen begins to fade when I pause to think of a word.  I then have to quickly move the mouse or it will log me out.  How do I fix this problem on both computers?

When I'm watching a film in Mythtv the screen turns to black every 10 - 15 mins and I have to log back into Ubuntu. Very annoying!  How do I disable the black screen / screensaver / logout in Unity?  There no longer seems to be any options to turn the screen saver off as there were in Ubuntu prior to Unity.


What is the minimum distance between an electron and a positron so that they do not annihilate?  I want to assume that the location of an electron can be determined with an accuracy of 0.004 Angstroms, as described here:  p.127  Under this premise, is there an exclusion criterion for annihilation concerning their spatial distance?

I've most often seen the statement that the annihilation of a particle and its antiparticle occurs when they 'collide' with one another. So in other words when they get very close to one another right?  How close do they need to be (for annihilation to occur)?  Charged normal/anti particles will naturally attract one another and lead to such a collision, but I imagine that non-charged pairs could be in some manner coaxed within close proximity - and short of a collision. In this situation can 'annihilation' be moderated to control the rate at which the energy is released, or does annihilation always occur as a sudden and full release of energy?  I did find a question very similar to my question here:    But it doesn't directly answer my main question nor the question of whether the annihilation event can be moderated.


Why can we not apply ampere circuital law in case of finite ,thin, straight current  carrying conductor as we do in case of infinite length of current carrying wire? when I apply for finite straight wire I get the same value of magnetic field as in case of infinte one. Which is wrong. Why is this happening?

When I was studying about . Then there comes a question in my mind that "whether this law is applicable for finite current carrying wire or not"


Ruined the update from 14 to 16 when I caused a freeze during the update, and now while in recovery mode, I forgot my username (I do know the password) which it keeps asking for while in safe mode. What to do besides a reformat? I can't do terminal options in recovery without first logging in, at least from what I've been able to do preboot (cannot boot UI). It's all recovery-esc fashions I'm able to do anything at all, but without my username I can't do anything (despite knowing my password 100% sure). The profile I always logged intgo was just called "D", so I'm assuming the actual name is just something I did in the beginning which I don't remember.

When I installed the latest update of Ubuntu, I was asked for the username but I do not remember what my username is. How do I find out what my username is?


Say I have this point:   45.1200,10.5000   From there I want to create another point that is 20 meters north and 10 meter east from the previous point. Is there any equation I can use for doing this?

I'm looking for an algorithm which when given a latitude and longitude pair and a vector translation in meters in Cartesian coordinates (x,y) would give me a new coordinate. Sort of like a reverse Haversine. I could also work with a distance and a heading transformation, but this would probably be slower and not as accurate. Ideally, the algorithm should be fast as I'm working on an embedded system. Accuracy is not critical, within 10 meters would be good.


It as been a week of UX self teaching. I have started studying UX design on my own, by reading books and information. I am self teaching and I would like to know how I can go about creating UX portfolio for myself to show future employers?  Thanks

I have been thinking of rebuilding my portfolio since its pretty outdated and I wanted some views on the approach I should take   Option 1 : Have an approach in which I list all the projects (major ones) on the front page and allow visitors to go through them   Option 2 : I build it like  a conventional site and allow users to learn more about me (and my design methodology) before they have a look at the projects ,so the order would be home ,about me,my portfolio and contact me  The thing is I have seen portfolios of designers who have employed either of the methods and have been successful but I get mixed signals from people about what exactly they want to see,some say that most people are not interested in who the person is and rather would just like to see the work while I have heard contrasting views from other people as well.  I also would like to hear your views on how you handle the issue of proprietary work being displayed on portfolios


Is there a good introductory book about finding closed forms of finite sums? I know Concrete Mathematics has a chapter on it but I was wondering if there is a more extensive resource.  EDIT: My question is about finite series, while the alleged duplicates are about infinite series.

I want to learn everything about sequences, sums and products from A - Z. Is there one book that stands out from the rest quality wise? I want to start my research off right!