Ok, A should say:   you should make your bed after you wake up.   or   you should make your bed after you woke up.   In case 1, the waking-up action happened before "make the bed", but English doesn't have "past in the future" tense though we do have "future in the past" tense (was going to do....)  In case 2, you broke the universe because the "waking up" action did not exist at the time of saying.

Ok, I should say:   You should make your bed after you wake up.   or   You should make your bed after you woke up.   or   You should make your bed after you have woken up.   In case 1, the waking-up action happened before "make the bed", but English doesn't have "past in the future" tense though we do have "future in the past" tense (was going to do....)  In case 2, you broke the universe because the "waking up" action did not exist at the time of saying.  In case 3, but we do have future perfect tense in English. However, we are not allowed to use future perfect after time clause but present perfect tense. So we cannot say "you should make your bed after you will have woken up", but we can say  "you should make your bed after you have woken up".  So, which one to use?


I need the admin URL wp-admin/ to be something else. This is not for security. It only personal preference.  I've tried many plugins and guide which doesn't seems to work for Wordpress 4.4.2:              The guide on first line above do redirect to correct location after login, but showing white screen instead of admin contents.  Some of the plugins also gave similar result, while the rest just give no difference.

Is it possible to rename the wp-admin folder?  I know I could just rename it, but unless it's supported by the code lots of things would break.  If I use a custom folder name, it will make it slightly more secure, security by obscurity and all that.


I use an external monitor and I've just upgraded to Bionic Beaver 18.04 from Xenial Xerus 16.04. The differences are striking ok, but the most annoying are:   when I ALT+TAB the app switcher is shown on the laptop monitor instead of the one where is the active window. the top bar (with clock and tray icons) is shown only on the laptop monitor.   Does anybody have a workaround?

I just installed Ubuntu 18. Since the top bar is only on the primary monitor, I can't use the mouse to grab and move my Chrome window (the top of the screen looks like below). Trying to do so results in grabbing a single tab and opening it in a new window.     Is there a way around this? Ideally, I'd like to have the top bar  across all screens. Another obvious disadvantage of only having the top bar on one screen is that the window menu of any window, not just Chrome, is displayed on the left upper corner of my left screen even when the window is in the lower right corner of the right screen.


If everyone is infected, why are the zombies trying to eat them and not other zombies?

Zombies are always after human beings. How do Zombies differentiate between a zombie and a human being? Why don't zombies eat each other?


I just read a post where someone said "That's a friend of mine's house." My first thought was, "mine's" is a double possessive! The friend owns the house, and the one posting the comment owns the friend. Anyway, is there a grammatically correct way to say this without rearranging the sentence or should you just rewrite it as "A friend of mine owns that house." Is there some kind of rule for turning a whole phrase possessive? Thanks.

I just stumbled upon a :     My wife and I's seafood collaboration dinner. How does it look?   Sure enough, the top comment immediately points out that it should be "my wife's and my". However, a cross-post to the Grammar subreddit produced :     It's fine as it is written. "my wife and I" is a noun phrase, functioning as a subjective pronoun in the singular and made possessive with the apostrophe. It is exactly the same as "our".      It seems weird because you would never use "I's" on its own but it is not on its own here - it is part of a noun phrase.   That's a rather intriguing argument. Does it hold any water?


This is a question that I frequently ask myself as a DM. I usually play a (home made) rule that you must first  succeed on an intelligence check with a DC that varies depending on the knowledge of the monster, this would mean if they encounter an Aboleth; an unknown monster to most, the DC would be higher than a Goblin. Is how it should be or should the players know the names of encountered monsters?

Background  I am a brand-new DM, about to lead a game for brand-new players.  I have a lot of knowledge of rules from playing Baldur's Gate and Neverwinter Nights over and over, leafing through a friend's books, and finally buying the three basic books for myself.    Question  How much information should I give to my players about monsters they encounter?  Should I essentially read the entire MM entry to them, or let them figure out how the enemies operate through experience, or (as I assume), something in the middle? Keep in mind, only one of them has even peripheral experience with D&D (they are very good sports for giving it a shot!), so they won't be bringing background knowledge to the table.  For example, do DMs generally let players know what immunities creatures have, or do they let them figure it out by trial and error?  What about offensive abilities?  For example, if a player has a potion of fire resistance, should I give them a heads-up about the fact that the chimera they're facing has a fire breath attack?


At the end of Wonder, August's parents are eating together, drinking a bit, etc.  During the course of the meal, his father gives his mother something in a box. She peeks inside and says that she'll use it later.  I didn't quite catch what it was, though - what was inside the box? Do we know?

There is a scene roughly in the last third of Wonder where Auggie's parents Nate and Isabel (Owen Wilson and Julia Roberts) spend an evening together while the kids are out. Nate has a surprise gift for his wife. She opens the box just enough to see it, laughs, and closes it again. So I asked myself the question:  What's in the box?


I have a very slow boot. Here is what I did to try to understand where it might be coming from:  >> systemd-analyze time  Startup finished in 7.305s (firmware) + 6.781s (loader) + 6.572s (kernel) + 2min 8.861s (userspace) = 2min 29.521s graphical.target reached after 2min 8.779s in userspace  >> systemd-analyze blame        2min 258ms networking.service       6.017s plymouth-quit-wait.service       5.071s resolvconf-pull-resolved.service       4.168s ath10k-delay-load.service       2.046s postfix@-.service       1.143s dev-nvme0n1p3.device       1.002s snapd.service   I also tried to inspect  >> dmesg   And I see the following jumps in time:  [   25.407277] IPv6: ADDRCONF(NETDEV_CHANGE): wlp58s0: link becomes ready [  129.053090] kauditd_printk_skb: 81 callbacks suppressed   and:  [  167.590890] audit: type=1400 audit(1590617895.162:102): apparmor="DENIED" operation="capable" profile="/snap/core/9066/usr/lib/snapd/snap-confine" pid=3965 comm="snap-confine" capability=4  capname="fsetid" [  216.258537] pci 0000:03:00.0: [8086:1575] type 00 class 0x088000   Here is the full dmesg output:   Not sure if any of that is related to the long waiting times. Does anyone have any ideas where to look more and what could be the issues? Please let me know what kind of additional information you would need.  Many thanks!

According to systemd-analyze blame, networking-service is taking over 5 minutes to start at boot:    Why is this happening and how can I fix it?


I'm trying to recover a book from my childhood:   I believe I read it in 199x, maybe early 200x No magic. Space sci-fi with hyperspace jumps between stars. The plot is all about jumps. Hyperspace jump destination is "random" and depends on jump starting point. To reach a specific location you usually need to make thousands of jumps in sequence. Paths are precious and were found accidentally or by recon drones.   Swarms of drones are constantly searching for shorter paths to known stars and back.  To make a blind jump (from some random point in space) usually means a suicide. The protagonist (male) was blinded on some planet and managed to create a kind of artificial eye, using a bird (crow?) More to the end of the book the protagonist was forced to make a blind jump on a spaceship with unknown destination and then he managed to return back to Earth using his blindness and camera

I read a story once about a man who escapes from his pursuers by doing an uncontrolled jump into hyperspace. If I'm not mixing my stories up he was blind but could see through the eyes of other sighted people/animals nearby. He was able to see through his pet but it dies and he thinks he's finished - he's blind and lost in hyperspace but there's a rat on board which he eventually catches by turning off gravity and then he can see through the rat's eyes. He works out how hyperspace operates and can hop back to where he came from.   Can anyone remember the name of the story and the author? I enjoyed it when I was a kid and would like to read it again.


How to find this limit: $$\lim_{x\to\ 1}\ln x \ln (1-x)$$ I wanted to try L'Hôpital's rule, but it doesn't work here, cause i get: $$\lim_{x\to\ 1} - \frac{\ln (x)}{1-x} + \frac{\ln (1-x)}{x}$$

Find $\lim_\limits{x\to 1^-}{\ln x\cdot \ln(1-x)}$. I can't even start because I don't really know what $x\to 1^-$ means. If you know what it means it would really help me. I would as well if you helped me with finding the limit, hinted or thorough.


I attempted to install Ubuntu 15 on a separate drive that I set aside just for Ubuntu, and for whatever reason, Ubuntu decided to make changes to my Windows 10 EFI partition on a completely separate drive. Now neither OS will boot. Can anyone help me figure out how to fix this and allow windows to boot again?

Hardware:  I've got an SSD (c),an internal HDD (d), an external HDD (e) and a USB flash drive (f).   How this all went down:   I downloaded Ubuntu and used a program to install it on my (F) drive. I reset my computer, ran the (F) drive for boot, and installed Ubuntu. I reset my computer, and it forcibly automatically booted into Windows 10 instead of Ubuntu. I went into Windows 10, and used a program called Easy BCD, by NeoSmart. I followed their guide, but after step 6, it wasn't the same for me. Their guide said that upon rebooting, I should see a grub screen that lets me choose between Windows/Linux and a few other options, however my computer would only boot into Windows 10.  I decided to follow the rest of the guide regardless, however by the end it would let me boot 'windows' or 'linux', but the linux option would always break. It went to a screen with lots of commands, that I thought -may- be a barebones Linux or something, but it definitely wasn't Ubuntu.  I decided to reinstall Ubuntu using the USB flash drive. Upon resetting, no matter what hard drive or format I select for booting (besides the F drive), it says An operating system wasn't found. Try disconnecting any drives that don't contain an operating system. I can boot the F drive and run Ubuntu, but it's a one time version that doesn't save any of my data. When I went into the installation, it still says that I already have Ubuntu installed on the 4TB HDD and that I have Windows 10 installed on the SSD, however I cannot seem to boot into either of them.   TLDR: Windows 10/Ubuntu are both installed, Windows on the internal SSD and Ubuntu on the external HDD. Ubuntu's installation program on the (F) drive recognizes them, however, when I try to boot anything it says An operating system wasn't found.   When I press F11 and force it to boot from the SSD it says:  error: no such device: 83b6c64d-9a2c0467b-a02c-6374ee6ac3dc.  error: unknown filesystem. Entering rescue mode. . .  grub rescue> _   and it will allow me to type some commands.


I already installed Ubuntu 12.04 dualboot on my brandnew Vaio Windows 8 and it doesn't boot any more to windows, so I have a vaio laptop with ubuntu, a thing I can accept but it is impossible to sync the ipod touch 4g iOs 6.1.3 so it (the ipod) became almost useless cus once I tryed to sync with rhytmbox itunes don't recogniz'it any more and the music tracks dont play anymore.  Could anybody help me with this issue?

What ubuntu applications provide support? (guides, how to's, status) Also, specifically, details on support for syncing music to iPhone's and iPod's with the latest OS version:   Can you sync music to apple devices using >iOS4? (iPhone & iPod) What applications allow you to do this and how? (guides, how to's, status)    What has already been established is:   Apple does not support Linux and has no plans to.  provides some support, however it currently does not support music/video synchronization with devices >iOS4. Go to  and scroll to the section titled "" to see if your device version is supported.


So today in my school our neighbor class monitors were complaining to that few of our students were yelling and making noise. Actually the case was that we were having very aggressive debate over a question. The question is quite simple but there is lot of confusion regarding it's solution because according to different students there are two very different approach toward this question. The question is,     Question: Find the derivative of    $$f(x)=x+x+x+x+x+...\quad x \mathrm\quad {times}$$   So here are two approach that my classmates are pretending to do.   First one (that I think is the correct approach) is that we can simplify the above function as $x$ times $x$ ( i.e. $f(x)=x^2$**)** , so that equation becomes,     $$f(x)=x^2$$   and simply we can write      $$f'(x)=2x$$   But my classmates are pretending to say that there is another way ( that I think is wrong ) to do this. In this method without simplifying the $f(x)$ we can differentiate individual terms in the sum. i.e.     $$f'(x)=\frac{d(x)}{dx}+\frac{d(x)}{dx}+\frac{d(x)}{dx}+\frac{d(x)}{dx}+...\quad x \quad\mathrm{times}$$   $$\implies f'(x)=1+1+1+1+1...\quad x \quad \mathrm{times}$$      $$\implies f'(x)=x$$   So in this way we are having two different answers (i.e $2x$ and $x$). However I know that $2x$ is the correct answer but honestly speaking I am really tiered to explain them how. However I tried to tell them that in second method (that I think is wrong method) we unintentionally ignore that $x$ times term and didn't involve in the differentiation while we do take care of that in the first method (that I think is correct).  Some are saying that $x$ is right while some are pretending to $2x$ to be right while some are saying that that both are wrong. I need a perfect answer that can satisfy my classmates.  Thanks!

Consider the following:   $1 = 1^2$ $2 + 2 = 2^2$ $3 + 3 + 3 = 3^2$   Therefore,   $\underbrace{x + x + x + \ldots + x}_{x \textrm{ times}}= x^2$   Take the derivative of lhs and rhs and we get:   $\underbrace{1 + 1 + 1 + \ldots + 1}_{x \textrm{ times}} = 2x$   Which simplifies to:   $x = 2x$   and hence    $1 = 2$.     Clearly something is wrong but I am unable pinpoint my mistake.


When we talk about kinetic energy of a body, it is actually the combined kinetic energies of all the atoms in that body. Now suppose a body is at rest. So its atoms would have some internal random motion and thus we can measure its temperature. But suppose it starts moving with a constant velocity $v$, so it will have kinetic energy $\frac{1}{2} mv^2$. So the kinetic energy of each atom is increased. So this means that the body will becomes hotter than earlier. But from the frame of body itself, it was at rest and thus there should be no change in its temperature although the temperature of the atoms of the ground should change. How is this even possible? Why is temperature of the same body different when seen from two different inertial frames? Does this mean that it is not compulsory that two inertial frames are equivalent? Note : I tried to search for a similar question on this site and I found  and the selected answer literally seems contradicting to me and my ideas. The answer talks about all three possibilities and all the possibilities are based on pure mathematics (I guess), so I would like to know why is there even a possibility of the temperature of a moving body to fall down or remain constant? Shouldn't it increase? Or if I am wrong somewhere please correct me. Please try to give a purely physical reason. It would be more appreciated since I am just a high schooler and don't understand those transformational mathematics. Edit: I don't know why is the question closed.  The question linked (as a dupe of ) , gives a wrong information that since pressure is invariant that's why temperature is invariant too. But this implies that pressure is more fundamental than temperature which is not true. So it will be helpful if the question is reopened and someone provides a proper reason for temperature invariance. Edit 2 : In thermodynamics we can change the internal energy of a system (and thus change the temperature) by doing work on it . Then why can't the work of friction change our body's temperature ?

In (non-relativistic) classical physics, if the temperature of an object is proportional to the average kinetic energy ${1 \over 2} m\overline {v^{2}}$of its particles (or molecules), then shouldn't that temperature depend on the frame of reference - since $\overline {v^{2}}$ will be different in different frames?  (I.e. In the lab frame  $K_l = {1 \over 2} m\overline {v^{2}} $, but in a frame moving with velocity $u$ relative to the lab frame, $K_u =  {1 \over 2} m \overline {(v+u)^{2}}$).


As per this , the reason there is a distinction between ref and out is because it is costly to copy the value of the variable when using ref.  Why is there a need to marshall in the first place? Doesn't C# just pass the pointer under the hood? In that case, there would be no need to copy values.

I'm creating a function where I need to pass an object so that it can be modified by the function. What is the difference between:  public void myFunction(ref MyClass someClass)   and  public void myFunction(out MyClass someClass)   Which should I use and why?


I have a Lenovo Edge E130 and a problem with Ubuntu 14.04. If I close the top the OS is sent to sleep mode. I would like to keep Ubuntu running. What exactly is the cause of this behavior?

I've set up a friends laptop with Ubuntu 12.04LTS with the Cinnamon desktop, and I'm having a few issues with the power settings.  As far as I can tell I've got every setting to "Do Nothing" when the lid is closed, however it still Suspends when I close the lid. After much Googling I'm still no closer to a solution, so I came here for help.


This is a question about trig substitution used in integrals. Because it is difficult to solve an integral when there is radical in it, we use a trig function of theta to substitute x from the original integral. The only thing I don't understand is why the ending symbol dx, which indicates that we are integrating the function with respect to the "x" variable, is also changed into a function of d theta and then multiplied by the integral after substitution. I think after substitution, we can just rewrite dx into d theta.

I just finished taking my first year of calculus in college and I passed with an A.  I don't think, however, that I ever really understood the entire $\frac{dy}{dx}$ notation (so I just focused on using $u'$), and now that I'm going to be starting calculus 2 and learning newer integration techniques, I feel that understanding the differential in an integral is important. Take this problem for an example: $$ \int 2x (x^2+4)^{100}dx $$ So solving this... $$u = x^2 + 4 \implies du = 2x dx \longleftarrow \text{why $dx$ here?}$$ And so now I'd have: $\displaystyle \int (u)^{100}du$ which is $\displaystyle \frac{u^{101}}{101} + C$ and then I'd just substitute back in my $u$. I'm so confused by all of this.  I know how to do it from practice, but I don't understand what is really happening here.  What happens to the $du$ between rewriting the integral and taking the anti-derivative?  Why is writing the $dx$ so important?  How should I be viewing this in when seeing an integral?


In this code 2nd line goes through the array and output what it receives and its random. But sometimes I get the same thing twice, like it would say "Straub", and then "Straub" and then something else like "Rusher". I've tried to do a "do while loop" but I don't know how to set it up where it doesn't repeat itself. By the way this the swift programming language.   let types = ["Alex", "Straub", "Rusher", "Graser"]  let type = types[Int(arc4random_uniform(UInt32(types.count)))]  println(type)   If you have any questions please post them in the comments section

If you have an NSMutableArray, how do you shuffle the elements randomly?  (I have my own answer for this, which is posted below, but I'm new to Cocoa and I'm interested to know if there is a better way.)    Update: As noted by @Mukesh, as of iOS 10+ and macOS 10.12+, there is an -[NSMutableArray shuffledArray] method that can be used to shuffle. See  for details. (But note that this creates a new array, rather than shuffling the elements in place.)


Working towards the complete classification of finite fields in our algebra class, some final book-keeping involved proving the above (for a prime $p$, $n \geq 1$).  I've tried comparing the factorised forms:  $$x^{p^n} - x = \prod_{a \in \mathbb{F_{p^n}}} (x-a)$$  but nothing is jumping out at me - I'm not even convinced the statement is true myself, yet. Any hints or intuition on why this is true or how to proceed would be appreciated.   Thanks

Let $x > 1$ and $a$, $b$ be positive integers. I know that $a$ divides $b$ implies that $x^a - 1$ divides $x^b - 1$. If $b = qa$, then  $$x^b - 1 = (x^a)^q - 1^q = (x^a - 1)((x^a)^{q-1} + \ldots + x^a + 1).$$  I'm interested in the converse of the statement. If $x^a - 1$ divides $x^b - 1$, does this imply that $a$ divides $b$?


A Sorcerer can create spell slots by expending sorcery points with the Flexible Casting feature.  In the rules, is there any point where it states that you can't have more spell slots than what the table shows?   One method that could potentially allow them to gain more slots than the table lists is by using a particular . The core being that they can take short rests over and over again and, using flexible casting, turn warlock slots into sorcery points and then into normal slots.  Is this supported by the rules?   Does the Sorcerer table show the maximum slots that a sorcerer can have or could they go above that?   Can the Sorcerer create spell slots in levels they don't currently have?

Does the following, very cheesy character concept, violate any RAW? Please cite rules or official rulings in your answer. (Apart from RAW, I expect my DM to disallow or limit the concept, in the interest of balance. That is not part of my question.)  Elf. Multiclass: Sorcerer 2+ / Warlock 1+ / Bard 1   Never takes a long rest. Ever. See question,  Specifically, whether adventuring or not, she makes sure that every 8 hour block includes more than 2 hours of combat or strenuous activity, to ensure that no interpretation of long rest rules would allow a long rest to be automatically triggered. Converts warlock spell slots into sorcery points. See . Converts sorcery points into sorcery spell slots (or into spellcasting spell slots, once also multiclassing Bard) via  Spell slots created from sorcery points disappear upon long rest, as per  and a ; therefore these created spell slots will not disappear until used, e.g. for a character taking no long rests Spell slots created from sorcery points are in addition to, and not restoration of the sorcerer's spell slots which refresh on a long rest. This is not 100% clear from RAW or clarifications. But: (a) Flexible Casting uses the phrase, "additional Spell Slots"; (b) the rule stating that created spell slots disappear on long rests is superfluous if created spell slots can only replace expended spell slots -- to have meaning it must be possible to create spell slots which are not replacements; (c) flexible casting does not use the word "recover", which is the word used for wizards'  Restores warlock spell slots on a short rest, and repeats the cycle above, converting warlock spell slots to sorcery points to sorcerer (or spellcasting) spell slots During periods of downtime, takes as many short rests per day as permissible, to build up a stockpile of created sorcerer spell slots Stockpiling requires using bonus actions out of combat,  Stockpiling requires having short rests on downtime days, discussed in a comment below While adventuring, during combat, uses created spell slots to cast spells, and/or uses flexible casting to convert those spell slots back into sorcery points While adventuring, after combat, will use created spell slots with Bard spells to restore hits points, since restoring hit points via long rest is unavailable, and via hit dice is mostly unavailable   I'm pretty sure this is not RAI, but does it violate RAW in some way?


Do we have any formula for the sum of factorials above?

I came across a question where I needed to find the sum of the factorials of the first $n$ numbers. So I was wondering if there is any generic formula for this? Like there is a generic formula for the series: $$ 1 + 2 + 3 + 4 + \cdots + n = \frac{n(n+1)}{2} $$ or $$ 1^{2} + 2^{2} + 3^{2} + 4^{2} + \cdots + n^{2} = \frac{n(n+1)(2n + 1)}{6} $$  Is there is any formula for: $$ 1! +2! +3! + 4! + \cdots + n! $$ and $$ {1!}^2 +{2!}^2 +{3!}^2 + \cdots + {n!}^2 $$?  Thanks in advance. If not, is there any research on making this type of formula? Because I am interested.


I've made a field of grass as a test. When I click on the render button it flashes the progress bar for half a second and the render screen is black  Here is a link to the file on my google drive

Blender is rendering an older version of my project, not the most recent one. I have made it using the Blender Render but it does not want to render in cycles either. A black and grey screen is rendered as if everything is transparent. Checked general camera, lighting and compute devises in case I messed something up but I can't find anything. All my textures and objects look normal, does anybody know what is wrong or what to check?  Ok added link:


I installed MySQL, and the installation requires a password. I didn't want to enter one, but I had to to click "Next" and finish the installation.  So, I tried to change it.   In the cmd prompt:  C:\>mysql -u root -p Enter password: **  mysql> use mysql; Database changed mysql> select `password` from `user` where `user` = 'root';   That returns an empty password field. But when I do mysql -u root I get the access denied error, and then I do mysql -u root -p and it asks for a password, I press enter, and I get denied access. So I repeat what's in the code block above, and the same thing happens.

My initial installation for the MySQL had no password for root. I assigned a password for root and everything worked fine. Due to some reason (don't ask why) I had to revert back to the original settings where root didn't have any password.  I changed the root password to '' (empty string). The problem now is that MySQL doesn't run with 'mysql -uroot', it expects a password. On running 'mysql -uroot -p' and hitting enter on the password prompt gets me into the db, but is not same as the default setting.  Is there any other flag/setting that I am missing to set/unset which tells mysql to not expect a password?  Thanks


How much voltage is required for the earphones by which we listen voice and songs ? Please help with the calculations if possible??If we keep our earphones plugged with our mobile phones,do the battery gets discharged faster?

I want to connect the output from the audio jack of an iPhone to an Arduino.  What voltage range can I expect to see on the audio lines from the iPhone? I assume that turning the volume up on the phone will produce a large AC voltage, but how large does it go up to?  I want to make sure that it wont exceed the voltage level that an Arduino can read on its input pins. Will I need to provide any circuitry between the iPhone and the Arduino?


Suppose $U$ is k-dimensional vector space on complex field, and $S\in L(U)$. Assume $S$ has at least $m$  distinct nonzero eigenvalues. Show that $\def\null{\operatorname{null}} \null (S^{k-m})= \null (S^{k-m+1})$  Here is my approach:  Suppose $ S \in L(U) $ and k is non-negative integer and $S$ has at least $m$ distinct non-zero eigenvalues. If $S^{k-m} v = 0 $ for all $v \in U$, then $S^{k-m+1} v = S (S^{k-m})=S(0)=0$. Thus, $ \null (S^{k-m}) = \null (S^{k-m+1})$.  Please give me feedback on my answer. If it is wrong, direct me to right track.  Thanks in advance!

I am given that $V$ is n-dimensional vector space over $\mathbb{C}$ and $T \in L(V)$. And $T$ has least $m$ distinct nonzero eigenvalues. How do I show that $\text{null}(T^{n-m}) = \text{null}(T^{n-m+1})$?  I'm really not sure how to start here so just the first couple steps would be very helpful. Thanks!!


I have just downloaded and installed Google Chrome for Linux, using Software Center. How do I now run the browser? This was simple in Windows - the program would typically be appended to the Start Menu, but there is no such thing in Ubuntu. I've noticed that stuff related to Chrome has been installed in the /opt/ directory, but I cannot find the equivalent to a .exe that would launch the browser.

Is there an equivalent of the Windows "Start Menu" in Ubuntu from where all installed programs can be easily accessed?


I created two separate classes, main and leads. The following is from 'leads' , I am trying to apply Leads.primeLead(); if the user answers Yes on the first question, and if not, I'd like to write a different method to add all the necessary information. My problem is that, I don't quite understand why the primeLead() wont apply on Lead constructor or how am I supposed to define it so it will. import java.util.ArrayList; import java.util.Scanner;  public class Lead {      String nameLead;     int ageLead;     int phoneLead;     String cityLead;     String email;     String otherNotes;      int indexOfLead = 0;     int i = indexOfLead;      ArrayList<String> names = new ArrayList<String>();     ArrayList<Integer> ages = new ArrayList<Integer>();     ArrayList<Integer> phones = new ArrayList<Integer>();     ArrayList<String> cities = new ArrayList<String>();     ArrayList<String> emails = new ArrayList<String>();     ArrayList<String> notes = new ArrayList<String>();      Scanner leads = new Scanner(System.in);      Lead() {         System.out.println("Is this the first lead? (Y/N) ");         if (leads.nextLine() == "Y") {             this.primeLead();         }     }     /* public mainMenuLead(){         System.out.println("Please choose one of the following options");     } */       Lead newLeads = new Lead();      public void primeLead() {         i = 0;         System.out.println("============================================");         System.out.println("  Please enter by the following order : ");         System.out.println("     Name, age, phone , city, mail     ");         System.out.println("============================================");          System.out.println("Please enter the name of the Lead :  ");         names.add(leads.nextLine());          System.out.println("Age? :  ");         ages.add(Integer.parseInt(leads.nextLine()));          System.out.println("Phone number? ");         phones.add(Integer.parseInt(leads.nextLine()));          System.out.println("Would you like to add ... ");         System.out.println("1) City? ");         System.out.println("2) Email? ");         System.out.println("3) Notes?  ");          if (leads.nextLine() == "1") {             System.out.println("Please add City: ");             cities.add(leads.nextLine());          } else if (leads.nextLine() == "2") {             System.out.println("Please add email : ");             emails.add(leads.nextLine());          } else if (leads.nextLine() == "3") {             System.out.println("Please add any other notes you may have:  ");             notes.add(leads.nextLine());         }     } }

I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.  Is == bad? When should it and should it not be used? What's the difference?


@article{1testing,   title={Title 1},   author={Zanthony1, Anthony2 and Anthony3},   journal={Journal 1},   volume={24},   number={2},   pages={258--300},   year={1992},   publisher={Springer} }  @article{2testing,   title={Title 2},   author={Zanthony1, Anthony2 and Anthony3},   journal={Journal 2},   volume={24},   number={2},   pages={200--264},   year={1992},   publisher={Springer} }   Both books by same author but different title of the book.    using:  \usepackage[backend=biber, style=authoryear, citestyle=authoryear]{biblatex}     \cite{1testing}          \cite{2testing}

I use biblatex with style=authoryear and when there are two references of the same author in the bibliography there is just a dash. How can I get the full name in the second entry too?


Would you briefly explain the use of the following wish in different perspective with various examples please?

Some people used to say:      Thank you very much.   Where others say:      Thank you so much.   Could anybody please explain what differences there may be between those, whether of correctness or usefulness or anything else that separates one version from the other.


I was wondering if there was a command in Python 3 that could be nested within a while loop and when run would return to the top of the loop (including checking the condition to decide to reenter the loop or not)? I have a while loop that contains multiple if/elif statements, I'm looking for a way that if a condition is met (lets say an if statement), the command would follow and bring me back to the top of the while loop instead of moving on to test the next condition (elif statement).  I've tried utilizing break statements but my problem is I want to stay in the while loop and reiterate through it (as opposed to breaking out of it entirely). I've also tried continue statements (but I may be using them wrong).  Here is an example of what I'm trying to accomplish  a = 0 while(a <= 5):     a += 1     if a == (1 or 2 or 3):         print('1')         # some command here that sends me back to the top of the while          # loop (line 2: to check if a<= 5)     elif a <= 5:         print('2')  ######  #The result I'm looking for would print: 1 1 1 2 2  #The result I get is: 1 2 2 2 2   The result I actually get shows that the program stays within the while loop and moves on to the next elif condition. I'm hoping to find a way to send the program back to the top of the while loop and rerun the conditions from there.  Many Thanks!

I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my except: clause to just skip the rest of the current iteration?


I am new to latex and I am having trouble typing the function range before I define the function. So I am trying to define a piecewise function, and how would I have something like this?

I know what my symbol or character looks like, but I don't know what the command is or which math alphabet it came from. How do I go about finding this out?


I cooked quinoa like rice and ate half of it. I am planning to have the other half for breakfast. Is it safe to leave it in room temperature overnight (I don't have a refrigerator)?

If I leave fully-cooked food (particularly meat) out at warm temperature - say on the counter or in a crock pot that's been turned off -  how long will it stay safe to eat?  Does it make any difference if I re-cook the food afterward?


What good ideas have you used or seen to get the party together at the beginning of a campaign?  There's the tried and true having them meet each other as wagon guards, or in a tavern that's attacked.  What have you used or seen to get the party together and get things moving in a fun, fast, and effective way?

I believe that it is generally a good thing that all the PCs travel together, as a "party". This way the GM has to manage one environment – not, say, five. The problem is how the GM can ensure such a relationship between the characters.  One simple and really great solution is to require the players to design their characters so that they know each other. This has the added advantage of cross-backstories – as the players try to adjust their stories to fit together, they get and create hooks for more narrative!  However, I am now experimenting with giving the players complete freedom at character creation and later meeting in-game. No luck so far.  It is not easy, as trusting someone with your life (what happens during combat) is not a trivial thing. Furthermore, people generally like others with the same behaviour/interests/skin colour. Fantasy is all about diversity – you do not character-generate a strong man with a sword, no, you generate a half-ogre with an axe never before seen!  How can the GM get players, with diverse characters who are strangers to each other, decide to have their PCs act as a coherent group. I absolutely want to avoid asking my players to just solve this through metagaming ("Hey Joe, think of a way to get together with those, I can't story-tell two separate groups at the same time!").  I'm not having the stereotypical problem where a bunch of PCs meet for the first time and are automatically so paranoid of strangers that they start trying to kill each other. My players have just created a bunch of characters who have their own legitimate interests, and are faithfully following those in completely different directions that don't result in a classic "party". I put the PCs in great peril together and everyone escaped by their own devices, but now I have to figure out get the guy who ran for the hills back together with the couple that entered the city. And, I want to do it by resorting only to reasonable in-game events, not out-of-game metagame suggestions.


I am searching for an antivirus which can run from portable drives so that whenever I get infected computer on my way I can scan it using my drive and clean the infected one and install new one there...  Is there any antivirus for such things?

What should I do if my Windows computer seems to be infected with a virus or malware?  What are the symptoms of an infection? What should I do after noticing an infection? What can I do to get rid of it? how to prevent from infection by malware?   This question comes up frequently, and the suggested solutions are usually the same. This community wiki is an attempt to serve as the definitive, most comprehensive answer possible. Feel free to add your contributions via edits.


We (mother, father and daughter) have a UK visit visa 6 month till November 30 but we cannot visit.  Previously, my mother and father had visa and visited in Jan 2019. But this is my first visitor visa valid till November 2019. But in this visa we are busy and cannot visit.  Now I will apply for a 2 year visa or 5 year visa? And the fact that we didnt use this 6 month visa, can it have a negative impact on our new application,  should we apply for 2 year or 5 year as my father also works (age 65) and I also work (age 30 and unmarried) and father works in private sector. Or 5 year visa has very little chances?

My friend and his wife visited UK during the year 2015. And they came back on time we want to know one information as they same couple want to visit UK again  For how many years or months can multiple entry visa can be given for a couple who have already visited UK?


could somebody help me with my APA references for my thesis? This is my code and all the packages that I include.  \documentclass[ 11pt,  english,  onehalfspacing  ]{MastersDoctoralThesis}  \usepackage[utf8]{inputenc} % Required for inputting international characters \usepackage[T1]{fontenc} % Output font encoding for international characters \usepackage{microtype} \usepackage{palatino}  \usepackage{multirow} \usepackage[table,xcdraw]{xcolor} \usepackage[backend=biber,style=apa,sorting=none,natbib=true]{biblatex} \usepackage[style=apa]{biblatex} \addbibresource{library.bib}  \usepackage[autostyle=true]{csquotes} \usepackage{datetime} \usepackage{pfnote} \usepackage{epstopdf} \usepackage{float} \usepackage{comment} \usepackage{subfig} \usepackage{graphicx} \usepackage{color} \usepackage{pdfpages} %\captionsetup[subfigure]{labelfont=rm} \captionsetup[subfigure]{margin=0pt, parskip=0pt, hangindent=0pt, indention=0pt, labelformat=parens, labelfont=rm} \printbibliography[heading=bibintoc]   <<-- here I always get the error: Undefined control sequence   I get a table with references, almost in the right way but unfortunately not alphabetically sorted and with "yearmonthday" in brackets instead of the year of publication.   Does somebody know my mistake? Thank you very much!

I am writing my thesis and need to do this with apa citation style.  I used the following code in my main document:  \usepackage[backend=biber,style=apa,sorting=none,natbib=true]{biblatex} \addbibresource{library.bib}  \usepackage[autostyle=true]{csquotes}    and in the end of my main document..  \printbibliography[heading=bibintoc,[title={References}]   However I always get this error:     "Undefined control sequence.   \printbibliography[heading=bibintoc,[title={References}]"   Furthermore in my references table, I get (yearmonthday) instead of (2015)e.g. and the references are not alphabetically sorted.


Consider the following LaTeX manuscript featuring a TikZ picture of a matrix with a single cell.  \documentclass[tikz]{standalone} \begin{document} \begin{tikzpicture}   \matrix[draw,nodes=draw]   {     \node {*}; \\   }; \end{tikzpicture} \end{document}   The resulting image is                                                                    How can I adjust the padding surrounding the cell? For instance, suppose I wish to get rid of the padding all together. I attempted to add inner sep=0pt to the matrix's option list, but then not only did the padding surrounding the cell collapse, but also the padding surrounding the asterisk inside the cell:                                                                       P.S. If the matrix has more than one cell, I don't wish to alter the spacing between the rows or the spacing between the columns; only the padding inside the matrix that surrounds the entire grid of cells.

I want to draw a TikZ matrix with its border and I would like to define the distance between most external matrix nodes and matrix border. Something like a matrix inner sep. If I change inner sep in matrix options declaration, all nodes inside the matrix also change its inner separation.      I know how to do it with fit library. I just want to know if its possible without it.


For some reason the glass meterial create a solid shadow, im not sure wheter its shadow setting problem or another problem which I havent figure it out. Appreciate it if someone can point out my problem or fix it for me.

I created a glass cone with black seams (the seams are a diffuse not transparent material).    When I shine light on it, the cone casts a solid shadow. Why is this?   I would like to have a (semi) transparent shadow cast from the glass and a full shadow from the seams.  Here is the link where you can (hopefully) download the blend file:


I know that once a user passes 1000 reputation (or 750 in a smaller site), they gain the ability to see vote-counts, rather than vote total (upvotes - downvotes). However, I don't really understand what purpose this serves. I know that some activities are not given to a new user to prevent spam/abuse (for example, limited voting, commenting, etc.), but what's the harm in letting a new user see vote-count?   And also, it seems to me like certain abilities or more important than vote-counts, but received earlier. For example, a user with 500 rep is trustworthy enough to downvote, award bounties, access the review queues and some other things, but not yet trustworthy enough to see how many down vs up votes a question has.  Why is this privilege designed the way it is? Also keep in mind, I'm not trying to change it, I just want to understand the thought-process behind it, since it doesn't make much sense to me.

Just curious, why is there a required privilege (especially one as high as 1000) to view vote counts for a post? It's not like someone can mess up a post by just viewing the vote counts. Is it just to give people incentive to reach 1000?


I've tried all the links nothing works. I'm using a mac. Packages I'm using are:  \usepackage{graphicx} \usepackage{caption}   Keeps coming out with the stupid Board.png on top how do I delete?    \begin{figure}[ht!] \centering \includegraphics[width=64mm]{Top Board.png} \caption*{Particles striking 2+ fibers on the top boards \label{overflow}} \end{figure}

I want to import graphics into my main input file using the macro \includegraphics. It does not work if the filename contains spaces.   also discusses this subject, but there is no solution there.  My compilation routine is latex->dvips->ps2pdf (because of PSTricks).


I created two arrays in that stored two array of string values now I want to compare by using if condition please help me.  I did like this....    String[] source={"Chennai","Bangalore","Hyderabad"};  String[] destination={"Chennai","Bangalore","Hyderabad"};  if(source[0] == "Chennai" && destination[2] == "Hyderabad") {       //Here i want to print some thing   }

I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.  Is == bad? When should it and should it not be used? What's the difference?


I want to use a javascript set whose elements are objects. However, I want two objects to be considered equal in a default way(same address). So how can we provide "hashCode" method or so in javascript like the one in Java?

Basically, I'm trying to create an object of unique objects, a set. I had the brilliant idea of just using a JavaScript object with objects for the property names. Such as,  set[obj] = true;   This works, up to a point. It works great with string and numbers, but with other objects, they all seem to "hash" to the same value and access the same property. Is there some kind of way I can generate a unique hash value for an object? How do strings and numbers do it, can I override the same behavior?


I was reading the a  and stumbled across <C-O>. How do I enter that on my keyboard? (I'm on a mac)

I'm trying to learn Vim and I'm seeing a lot of documentation use syntax like <C-v>. Is there a general guide on how to read this correctly? I've attached an example SO post below that uses this syntax:   Do yourself a favor by droping the Windows compatibility layer. The normal shortcut for entering Visual-Block mode is <C-v>.


\[   \begin{aligned}  \left{x= [1,0]^{T}t \right) \Rightarrow x^{T}Ax = \alpha > 0,t \\   x= [1,0]^{T} \Rightarrow x^{T}Ax = \gamma > 0),\\  x = [1,1]^{T} \Rightarrow x^{T}Ax = \alpha  + 2\beta + \gamma  > 0,\\  x = [1,-1]^{T}  \Rightarrow x^{T}Ax = \alpha - 2\beta + \gamma  > 0.  \end{aligned}   \right\]      i want to use left and right in my code and i he dont accept with textstudio

What are their uses and are they even standard?


I have been needing to import anywhere between a few to 10's of text layers into a project per day for my job.    The text files are in a .log format (Space Delimited) The X, Y, and CRS designations are the same for all of the files    Is there a plug-in or python command that would help me import these files more efficiently?

How can I load multiple CSV files into QGIS with Longitude/Latitude already included in it. I downloaded the "Load Them All" plug-in, however, the result loaded was converted as text files and cannot be visualize on the map canvass. Any help? Are there any available plug-ins that can load multiple CSV file that will work fine in QGIS?


def multipliers():     return [lambda x: i * x for i in range(4)]   print([m(1) for m in multipliers()]) # [3, 3, 3, 3]   Why it's not [0, 1, 2, 3]? Can't understand. So, for some reason we have i = 3 in all lambdas? Why?

I want to create a list of lambda objects from a list of constants in Python; for instance:  listOfNumbers = [1,2,3,4,5] square = lambda x: x * x listOfLambdas = [lambda: square(i) for i in listOfNumbers]   This will create a list of lambda objects, however, when I run them:  for f in listOfLambdas:     print f(),   I would expect that it would print  1 4 9 16 25   Instead, it prints:  25 25 25 25 25   It seems as though the lambdas have all been given the wrong parameter. Have I done something wrong, and is there a way to fix it? I'm in Python 2.4 I think.  EDIT: a bit more of trying things and such came up with this:  listOfLambdas = [] for num in listOfNumbers:     action = lambda: square(num)     listOfLambdas.append(action)     print action()   Prints the expected squares from 1 to 25, but then using the earlier print statement:  for f in listOfLambdas:     print f(),   still gives me all 25s. How did the existing lambda objects change between those two print calls?  Related question:


As you can see below, there's some strange, slightly visible shading issues on my mesh. I looked at the normals and they're facing the right way, and I tried using an edge split modifier as well. This started happening after I extruded a circle and used the difference boolean modifier on the mesh. If you know an answer than can help me remove these weird glitches, ty! :)    Edit: Same picture in edit mode.

Whenever I try to cut out a circular hole in either a cylinder or sphere the polygons around the circular hole always have distorted normals after smoothing. Is there anyway to fix this. I've tried using the remesh modifier but wind up with some pretty ugly results.


Find the Remainder when $333^{333}$ is divided by $7$  I think I have to find $333^{333}\equiv r \pmod7$ where $r(\ge0)$ is the remainder but how do I get in that form

How do I efficiently compute $a^b\bmod c$:  When $b$ is huge, for instance $5^{844325}\bmod 21$? When $b$ is less than $c$ but it would still be a lot of work to multiply $a$ by itself $b$ times, for instance $5^{69}\bmod 101$? When $(a,c)\ne1$, for instance $6^{103}\bmod 14$?  Are there any other tricks for evaluating exponents in modular arithmetic?  This is being asked in an effort to cut down on duplicates, see  and .


#include <stdio.h>  int main() {  float k;     scanf("%f", &k);     printf("%f", k); }    In this simple program when I enter a number containing at most 8 digits then it is displayed correctly.  But if I exceed 8 digits i.e. for the input 123456789 the output is 123456792.   Why this is happening? Well the fun fact is that if I enter any number between 123456789 and 123456796 then it always shows 123456792.  Is it something related to the 8 decimal precision of floating numbers?

Consider the following code:   0.1 + 0.2 == 0.3  ->  false   0.1 + 0.2         ->  0.30000000000000004   Why do these inaccuracies happen?


I'm new to Math Induction, I don't know how it goes from $𝑘 + 1 = 3𝑥 + 5𝑦 + 1$ into $5𝑦 = 5𝑦 − 5 + 5.$  I'm trying to prove that:   Any whole number of at least 8 cents can be obtained using coins of 3 and 5 cents  Assume: There is a number $𝑘$ for which there are $𝑥$ and $𝑦$ such that $𝑘 = 3𝑥 + 5𝑦$  Here's my working:  $𝑘 = 3𝑥 + 5𝑦$  Therefore $𝑘 + 1 = 3𝑥 + 5𝑦 + 1$  $5𝑦 = 5𝑦 − 5 + 5$  $5𝑦 = 5 𝑦 − 1 + 5$  $𝑘 + 1 = 3𝑥 + 5𝑦 + 1$  $𝑘 + 1 = 3𝑥 + 5(𝑦 − 1) + 5 + 1$  $𝑘 + 1 = 3𝑥 + 5(𝑦 − 1) + 6$  $𝑘 + 1 = 3(𝑥 + 2) + 5(𝑦 − 1)$  $𝒌 + 𝟏 = 𝟑𝒙' + 𝟓𝒚'$

I want to determine the set of natural numbers that can be expressed as the sum of some non-negative number of 3s and 5s.  $$S=\{3k+5j∣k,j∈\mathbb{N}∪\{0\}\}$$  I want to check whether that would be: 0,3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and so on.  Meaning that it would include 0, 3, 5, 8. Then from 9 and on, every Natural Number. But how would I explain it as a set? or prove that these are the numbers in the set?


Let $a,b,c \in \mathbb{Z}$, prove that if $\gcd(a,b)=1$, then $\gcd(a\cdot b,c) = \gcd(a,c)\cdot \gcd(b,c)$.

Let $a, b, c$ be integers. Prove that if $\gcd(a,b)=1$ then $\gcd(ab,c) = \gcd(a,c) \gcd(b,c)$  First time asking here. I'm not sure what your policies are on general homework help but I truly am stuck.  So far I have shown $\gcd(a,c) \gcd(b,c)$ as an integer combination of $ab$ and $c$. So if I can show that $\gcd(a,c) \gcd(b,c)$ divides $ab$ and $c$ I can use the proof that if an integer $d$ is a common divisor of $a$ and $b$, and $d=ax+by$ for some $x$ and $y$, that $d=\gcd(a,b)$. However I don't really know where to start with this. Any help would be appreciated.


Problem: Let $X$ be an algebraic curve defined by $y^2= x^3$ and $f(t) =(t^2, t^3)$ the regular map $\mathbb{A}^1 \to X$. Prove that $f$ is not an isomorphism. What are the rational functions in $t$ that correspond to the functions in the local ring of the point $(0,0)$?   My attempt: I tried to construct the inverse as $P(x) + Q(x)y$ with $P(x), Q(x)$ polynomials, because every regular function on $X$ can be written uniquely in this form, but I have trouble constructing the inverse. By writing $x= t^2$ and $y= t^3$ and composing the two functions I got $P(t^2) + Q(t^2)t^3$ and I think I should prove that this last expression is not equal to $t$ for no $P$ or $Q$, but I’m stuck. For the last question, I wrote the local ring $O_x= \left\{ \frac{P_1(x) + Q_1(x)y}{P_2(x)} \right\}$, with $P_2$ having a nonzero constant term. How do I express now the rational functions in $t$ corresponding to that?

Let $X\subseteq\mathbb{C}^n$ and $Y\subseteq\mathbb{C}^m$ be two complex affine varieties (zero sets of systems of polynomials). Suppose that $$f:X\to Y$$ is a polynomial map, or more precisely, it is given explicitly by $$f(x)=(f_1(x),\ldots,f_m(x)),$$ where $f_i:\mathbb{C}^n\to\mathbb{C}$ are polynomials in $n$-variables.     Question: If $f$ is a bijection, is it necessarily an isomorphism of complex affine varieties?


public static void main(String[] args){  }   what is the difference between public static void main(String[] args) and public static void main(String args[])

I have recently been thinking about the difference between the two ways of defining an array:   int[] array int array[]   Is there a difference?


I am asking for the definition of "free". What is the difference between, say, any old abelian group, and a free abelian group?

What is the difference between free groups and free modules/vector/algebras spaces, or in other words what does free mean in algebra?   I have seen two uses of the term free:   something of infinite order that is generate by a linear independent set called a basis. I have seen this applied to (Groups/abelian groups/vector spaces/modules/algebras) an algebraic structure in which there is no defined relation between elements. I have seen this apllied to vector spaces/modules-used in tensor product definition.   Thanks


Can I write "Structure is key to the clarity of writing" without a determiner before "structure"?

I can’t for the life of me figure out where to use a and where to use the — and where there is no article at all. Is there a simple rule of thumb to memorize?   The standard rule you always hear:     “If a person knows which item you are talking about then use "the"   . . . doesn’t clear things up for me, as I have no idea whether or not they know.


I have a hard drive which is crashed. In the explorer I can't see the hard drive. With tools like  I can see the files I lost. Are there any free tools I can use to recover my data? I searched a lot on the internet but there are just paid tools. I already tried built-in tools in Windows in the command prompt, but None of them worked at all. Can you give me a suggestion

Last night my 500 GB Seagate hard drive was fine but this morning it suddenly started crashing, somehow I made it work after a chkdsk but 2 partitions show space is full now but it wasn't when the drive was fine. The 3rd partition one is also acting weird.   Whenever I try to open any drive, Windows asks to format it. My drive is still under warranty but I don't want to lose any data. How can I recover data from this crashed/crashing hard drive?   my OS is: windows xp sp3 Processor: Inter Pentium 4 3.0 GHz 1 GB RAM Already have 2 other hard drives  1 - 320 GB - OS drive - seagate 2 - 1 TB - western digital   UPDATE 1: when using Test Disk: it's showing some read errors  UPDATE 2: Now all the partitions are not showing up in my computer, but can see the hard drive in hardware manager, now what to do ?  Here are some screenshots:


I've reached the reputation cap 1 hour ago (200), but a minute ago I received an upvote for an answer which is not an accepted one and now I have 210. Is this a bug or the rep cap was changed recently?

I've found some questions and those two badges "Epic" and "Legendary" regarding the "daily reputation cap". What is it and how can I hit it?


I need to find coordinates of a point at which the sum of the squared distances to each of the three lines that form a triangle is minimized.  It seemed to me that the point is the triangle's incenter, but that doesn't seem to be the case. Any thoughts?  Thanks!

From Wolfram , I know there is a Lemoine point of triangle, also called symmedian point, the sum of squared distances of this point to all the three sides is algebraically minimum.    How to prove such a property?


I just installed 12.04 (dual-boot, kept Windows just in case) on my new Acer Aspire One 756-877. As soon as I installed it, I also installed the Broadcom driver, since Wi-Fi wasn't working, and that solved it right away. But when I tried Bluetooth, I had a problem that I see is quite recurring:   The hardware is on (and working fine under Windows) The icon shows up on the menu, giving me the options of turning Bluetooth on or off, and then just "Bluetooth preferences". I can apparently turn it on that way, which only lights up the icon but makes no difference at all (and doesn't give any other options in the Bluetooth menu) When I open "Bluetooth preferences" (whether Bluetooth is apparently on or off, it makes no difference), it says it's disabled and will not let me slide the button to enable it. I've rebooted, but nothing happens. The material is Broadcom and the port (if it's relevant at all) is Port_#0001.Hub_#0003   I tried the following commands suggested in other similar questions, with no result at all:  sudo dmesg | grep blue  sudo service bluetooth start  sudo /etc/init.d/bluetooth start   Any other clues on what I can do?

I'm having serious problems installing the Broadcom drivers for Ubuntu. It worked perfectly on my previous version, but now, it is impossible.   What are the steps to install Broadcom wireless drivers for a BCM43xx card?  I'm a user with no advance knowledge in Linux, so I would need clear explanations on how to make, compile, etc.    lspci -vnn | grep Network showed:   Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b]      iwconfig showed:  lo        no wireless extensions. eth0      no wireless extensions.   NOTE: Answer below is updated every time new information is added and confirmed working.


Last night around 10:30pm, I put a frozen chicken thighs, vacuum packed in a pot of cold water to defrost. I intended to put the whole pot in the fridge before going up to bed. Unfortunately, I dozed off in front of the TV, forgot about the chicken & went up to bed. This morning I remembered as soon as I opened my eyes. I called my spouse who goes downstairs every morning around 3:35am, to ask if he noticed the pot w/the chicken, he said he did, & put the whole pot in the fridge. He said her checked, chicken was still ice cold & no odor. I went downstairs to check myself, he’s right, but I’m still nervous about using the chicken, it sat in water 4.5 hours. I feel I need to discard this pack & just defrost a new pack. Am I right, or just being wasteful.

What is the safest, quick way to defrost chicken? Microwave? Running water over it?


which domain knowledge other than software engineering can help a tester generate good test ideas?  any books , courses, philosophy, theories , puzzles etc.

I'm trying to learn more about software testing, so I want to know which books you would recommend on this topic


I saw somewhere the the cantor set is in bijection with $\mathcal P(\mathbb N)$, so this mean that $\mathcal P(\mathbb N)$ is uncountable. But how can I show that $\mathcal P(\mathbb N)$ is uncountable ?

Consider a common proof of the uncountability of $(0,1]$, as presented  for example:  We assume that the reals can be arranged in a sequence $x_k$, represent every number in $x_k$ by its nonterminating decimal expansion, use the diagonal argument to create a sequence of decimal digits that differs from the nonterminating decimal expansion of each number in $x_k$ and then claim that this sequence of digits so generated must be the decimal expansion of some number not in $x_k$.  My problem is with this last step. Could it not be the case that the new sequence of digits is just the terminating decimal expansion of some number already in $x_k$?  Would it not be more correct to use the sequence $x_k$ to generate a sequence of all (both terminating and non-terminating) decimal expansion of all numbers in $[0,1)$ and then apply the diagonal argument?


I have a folder called servers, and I need to make it, and all its contents accessible to both surge and minecraft.   I tried  chmod -R minecraft+surge servers   it replies  chmod: invalid mode: ‘minecraft+surge’

I and my brother have User Accounts on this machine. I want to share the Documents directory with him.  Is there a STRAIGHTFORWARD way to do it?  I am not a power user so I am looking for a way to do this using nautilus, rather than a script or a way that requires creating symlinks.  I can download an application if i have to.  Last time I wanted to do this I just copied the contents to /home for both of us to use.  Something I can do in System Settings would be appreciated


I was watching a video which uses integration to show that the area under the standard normal distribution function is equal to $1$. The function was squared which resulted in two variables $x$ and $y$. This was converted to polar coordinated by $x=r\cos\theta$ and $y=r\sin\theta$ The next line was $$dx\,dy=r\,dr\,d\theta$$ I have no idea where that came from. I would have thought that $dx=-r\sin\theta\ d\theta$ and $dy=r\cos\theta\ d\theta$ And hence $$dx\,dy=-r^2\sin\theta\cos\theta\ d\theta\ d\theta$$ Where did that expression come from?

It is changing the coordinate from one coordinate to another. There is an angle and radius on the right side. What is it? And why?  I got:  $2\,\mathrm dy\,\mathrm dx = r(\cos^2\alpha-\sin^2\alpha)\,\mathrm d\alpha \,\mathrm dr$,  where $x = r \cos(\alpha)$ and $y = r \sin(\alpha)$.  but cannot understand and get the right side. The problem emerged when trying to integrate $\displaystyle \int_0^\infty e^{\frac{-x^2}{n^2}}\,\mathrm dx$ where I tried to change the problem knowing $r^2=x^2+y^2$ but stuck to this part. What is the change in the title called and why is it so?


What is the rule for spacing between words and the character &? For example, do I have to space Espresso&Tonic - Espresso & Tonic, although I am talking about one drink made with an espresso and tonic? Thanks

A colleague and I have a difference of opinion. I believe our department should be abbreviated as "L&D." She believes it should be "L & D," which just looks silly to me. I never see spaces used before and after an ampersand when the term is an abbreviation (two distinct words, yes, but an abbreviation, no), but I haven't been able to find a rule pertaining to this particular issue. Is there one?


I noticed my phone responds to my finger, but not to a plain graphite pencil.   Why is that, what is its physical reason?  How are styli able to approximate the human touch? What kind of conductive materials are being used there?

I have watched some youtube videos about capacitive touch screen      The videos show that a conductor(finger), in which charges can be induced, can be used to trigger the capacitive touch screen. However, I tried to wear a plastic glove to hold a metal rod to touch the screen and no detection is triggered.  I really want to know the physics theory about the capacitive sensing.  Can someone tell me what physical properties or shape trigger the capacitive touch screen?  Is there any examples that something WITHOUT conducting to human body can trigger the screen?  (P.S. I have read other posts about capacitive touch screen here and do not find a good answer so this is not a duplicate)


I had a directory structure (src/...) created by Cygwin's 7za.exe.  From a command prompt I ran rmdir /s /q src. This resulted in error messages (paraphrasing as my DOS shell has long since overflowed):  Cannot delete src/test/unit/geom The directory is not empty  Browsing to src/test/unit/geom showed that it was indeed empty, so I ran the same rmdir command again.  Same error, but pointing at src/test/unit instead.  And my Explorer window that was showing the absence of contents in src/test/unit/geom dropped down to src/test/unit. Three rmdir executions later, it is fully gone. This is Windows 7 and set CYGWIN=nontsec had been run.  I believe this has been the source of  for some time now, but until now I hadn't identified the culprit. What can I do to avoid this in the future?  If it happens again, what should I look for in terms of identifying corrupt aspects of the directory structure?

I need to delete one folder containing other folders and files inside. I tried del and rmdir commands but sometimes they fail with some error lines: [PATH]: The directory isn't empty.  Is there any good alternative?


For an observer outside Black hole's event horizon nothing ever falls into the black hole .  So if the observer waits for an eternity outside a super massive blackhole feeding on gas , will the observer ever see the blackhole grow in size expanding its event horizon ?

The event horizon of a black hole is where gravity is such that not even light can escape. This is also the point I understand that according to Einstein time dilation will be infinite for a far-away-observer.  If this is the case how can anything ever fall into a black hole.  In my thought experiment I am in a spaceship with a powerful telescope that can detect light at a wide range of wavelengths.  I have it focused on the black hole and watch as a large rock approaches the event horizon.  Am I correct in saying that from my far-away-position the rock would freeze outside the event horizon and would never pass it? If this is the case how can a black hole ever consume any material, let alone grow to millions of solar masses.  If I was able to train the telescope onto the black hole for millions of years would I still see the rock at the edge of the event horizon?  I am getting ready for the response of the object would slowly fade.  Why would it slowly fade and if it would how long would this fading take?  If it is going to red shift at some point would the red shifting not slow down to a standstill? This question has been bugging me for years!  OK - just an edit based on responses so far.  Again, please keep thinking from an observers point of view.  If observers see objects slowly fade and slowly disappear as they approach the event horizon would that mean that over time the event horizon would be "lumpy" with objects invisible, but not passed through?  We should be able to detect the "lumpiness" should we not through?


I've added custom fonts to my xcode project and they show up just fine when I run the app in the simulator but when I run it on my iPhone they don't show up. This is the code in my AppDelegate.m file  [[UINavigationBar appearance] setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys: [UIColor colorWithRed:23.0/255.0 green:97.0/255.0 blue:115.0/255.0 alpha:1.0], UITextAttributeTextColor, [UIFont fontWithName:@"Lily Script One" size:23.0], UITextAttributeFont, nil]];

I would like to have an app include a custom font for rendering text, load it, and then use it with standard UIKit elements like UILabel. Is this possible?


Today I started getting a black screen when resuming my computer from sleep. Completely unresponsive. Couldn't even switch to another tty. Are a hard shutdown everything worked fine, but the same behavior reappeared after every suspend.  Naive as I was, I thought that maybe an update would solve the problem. Now after completing the upgrade I experience the same behaviour on boot. Right after the GRUB menu, the screen goes black. Choosing recovery mode and dropping to a root shell works as it's supposed to.  I've checked boot.log, syslog and the systemd logs and I can't find anything that looks like a serious problem. Here's a link to my , in case it helps.  My computer runs the mini.iso release of Ubuntu 17.10.  I'm really stumped here an have no idea where to look right now. I'd really appreciate some help!  Thanks  EDIT:  So it turns out that the suspension and boot to black screen were two separate problems. I managed to fix the boot problem by changing the grub config; it must have been messed up by the upgrade. The problem still remains after resuming from suspend however (closing the lid or running systemctl suspend)  EDIT 2:  I found this error in my systemd logs: wlp4s0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22) which led me to . I have now upgraded to kernel 4.15.0 but I'm still seeing the same issue.  It actually looks like the screen doesn't turn on at all. It's not just blank but completely black.

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 had 5 outlets moved to under my cabinets. The Electrician put a junction box over the old outlets. I now need to install backsplash. Can the tile guy cover the box with the backsplash?

The outlet for my range hood was misplaced. It needs to be 4 inches to the side. I can make the junction and move the wiring to the new location but I really don't want to have the empty plate exposed.   The wire is not long enough to reach the required location, so I will make a junction in the existing box, and add a new box at the correct location.  Is there any acceptable circumstance where I could tile over the "old" in-wall junction box?  I'm guessing not, but I figured I'd ask.  EDIT: I should clarify, based on the answers below... I know for a fact that this outlet is the only line on this entire circuit, all the way back to the panel. I am asking explicitly if there is any way to acceptably splice the wiring without exposing a junction box.


Got this layout bug while rotating the iPad from portrait to landscape while it was loading content. It happened right after I tapped the topic in the sidebar.     App Version: 1.6.6.2 Device: iPad Air 2 (Wi-Fi) OS Version: Version 10.3.3 (Build 14G60)

Open question with many of answers, e.g. . Scroll down several times to force loading of the rest of answers. Rotate your iDevice (tested on iPad) quickly. Screen resizing stuck after stoping rotation.                 Rest of UI is working well: can scroll, select tabs etc. Looks like screen size is locked with one dimension from portrait mode and another one from landscape mode.  Dropping app to background and restore - fixes dimensions.   App Version: 1.6.2.5 Device: iPad Air 2 (Wi-Fi) OS Version: Version 10.2 (Build 14C92)


Please help me to prove the following resut:  Let $R=\prod_{n\in\mathbb{N}}\mathbb{Z}$ and $M$ be $R$ regarded as $R$-module is usual way.     Then the submodule $N=\bigoplus_{n\in\mathbb{N}}\mathbb{Z}$ is not finitely generated   Hint: for every $n\in\mathbb{N}$, $e_n=(0,…,0,1,0,…)\in N$ (the $1$ is on the $n-$th position).  Thanks in advance

Let $R=\prod_{n\in\mathbb{N}}\mathbb{Z}$ and $M$ be $R$ regarded as $R$-module is usual way.  The submodule $N=\bigoplus_{n\in\mathbb{N}}\mathbb{Z}$ is it finitely generated?  Thanks


I've taken ESRI database courses, which have been helpful to my work but I also need training in Python as applied to geodatabase management?


Let $X$ and $Y$ be independent random variables of exponential distribution with mean $1$.  Another variable $Z$ is defined as $\min \{X,Y\}$. I need to find the mean of $Z$.  I only figured that $Z=x,Z=y$ with equal probabilty $0.5$, not sure what to do now.   Thanks in advance.

How can I prove that the minimum of two exponential random variables is another exponential random variable, i.e. Z = min(X,Y)


What is the word that describes a lover of general science? A philomath is a lover of learning and a philonoist is one who seeks knowledge.  I am looking for a word that ends in 'phile

I'm searching for a one-word synonym for "science lover". In my case, I love science and I self study it, but I never got a degree in Physics or Chemistry or any of these related subjects (except computer-science). But I enjoy experimenting stuff and see what's going on.  So, what would be a one-word good alternative for "science lover"?  The best one I found is learner, but that's more general I guess. Scientist is probably too much in my case. I saw sciencophile in another post, but I don't really like it–it sounds too complicated.


I'm working on a design which is to be printed and displayed on a 8ft by 2.32ft. What dimension can I use when using photoshop because I can't find any fonts that can extend that large. Thanks.

For wall-sized graphics and large banners (e.g. 3m × 5m), what is an acceptable PPI for print? As I understand it 300 ppi is the typical for 'small' artworks (esp. for clean text resolution). However, for small artworks, the audience usually engages at a much closer distance. Therefore, in the interests of keeping a bitmap file down to a reasonable size, can you get away with a much-reduced PPI for a large format/banner print?


I am trying to run 2 apps in split screen with both staying active at the same time. Most results on google are saying this is not possible and they blame the app for it not working. Below is some detailed testing I have done.  This is an android issue/setting, not an app issue. The reason I know this is because I have 2 phones both using split screen. One can/will/does keep both apps active at the same time while one pauses whichever one is not in focus. The apps are identical across both phones.   Apps for testing: Pokemon Go (Pogo) + Jurassic World Alive (JWA) (both AR games that use GPS and real time location constantly). Phones for testing: Moto X4 and Xiaomi Redmi 5 Plus (I have previously tested on the Axon 7 and the Nexus 4-5-6, both behave the same as the Moto X4 currently does). Android versions: Redmi5 - Android 7.1.2 (MIUI 9.6.2.0) | Moto X4 - Android 8.1.0    One item of note: On the Moto I had to enable developer mode and turn on 'Force activities to be resizable' before either app could be put into split screen. On the Redmi5 this was not needed as it was already enabled. Test method: Open Pogo normally. Use the 'intents' (app switch) button and at top click the section titled "split screen" (both phones have slightly diff wording here). Drag Pogo up there and it takes up the top half of the screen. In the bottom section, select previously running JWA (or start it from home screen) and it will take up the bottom section of the screen. Wanted outcome (Redmi 5 Plus): Top portion continues without pausing and bottom game loads and works without pausing. Both apps continue to run as if they were running in full screen and were active  Unwanted outcome (Moto X4/Axon7/Nexus(4|5|6): Top app freezes or pauses when you load the bottom app. To unpause it, click on it, but this pauses the bottom app. Whichever app was last clicked on is active.   Since the apps I am using to test are identical across 3 of the phones I am testing (never tested JWA on the nexus phones) this cannot simply be an issue with the apps not supporting it. There has to be some setting that Xiaomi or MIUI enabled to allow this to work.  Another note, I am not trying to get only these 2 apps working, but these are 2 I would like to have working and made for good test apps due to how they run.  I realize my ask here may be unclear. I want to know how to duplicate the functionality from the Redmi 5 Plus on my other devices (Moto X4, etc).  'Duplicate' edit: I do not feel like the question listed as duplicate answers mine other than "you cant", but obviously MIUI or Xiaomi did. Also that answer seems to point to some side effects I should be experiencing on my Redmi that I am not (apps not pausing when minimized/unfocused).

Android 7.0 introduced the native multi-window API which allows apps to be viewed in split-screen mode globally.  However, in actual usage, one downside prevents it from being as useful as some users would imagine. Many apps, when in the multi-window view but not in focus (i.e. user is interacting with another app in the multi-window view), pauses its activities: IM apps would no longer update incoming messages; music/video apps would pause playback; games would not proceed with their actions.  The official developer guideline  the pausing behavior, and from what I understand, apps need to be programmed with this in mind so as to not exhibit it. But is there a way I can force the way around the limitation as a user? From what I've heard from fellow users, certain manufacturers' Android forks such as MIUI do not show such pausing whatsoever.  TL;DR: Can I prevent the out-of-focus app from pausing in multi-window?


I'm new to SEO but been working for a while in our own company site, I have fetch and probe everything in the GSC even sent a update sitemap recently, already processed and everything is cool, but when I search in google something like this shows up    all I want is to have all my site under the same result like this:    Could you give me some advice on it.  It's worth to say, I have everything check on the search console, my sitemap updated and valid.

My website used to have sitelinks and now it doesn't. It's very possible that it's due to changing the website to a sidebar design instead of having an "interstitial" type landing page which limited the number of choices, but I'm not sure.  Here is how sitelinks might look for a site:    What are some things that I can do to improve my chances of getting sitelinks?


Using Postgres 9.5. The  says that the btree index can be used for left-anchored "like" queries (i.e. "%" only at end). But my left-anchored "like" queries on a 1 billion row table won't use a btree index, and my queries are taking forever. What am I missing? Here's a small example that demonstrates the problem:  -- generate a table of 100K integers with random texts CREATE TABLE test(num integer, string text); INSERT INTO test(num, string) (SELECT generate_series(1, 100000), md5(random()::text));  CREATE INDEX test_string ON test USING btree (string); -- b-tree index  EXPLAIN SELECT * FROM test WHERE string LIKE 'asdf%'; -- will use seqscan EXPLAIN SELECT * FROM test WHERE string = 'asdf'; -- will use index SET enable_seqscan=off; -- tell query planner to avoid seqscan if possible EXPLAIN SELECT * FROM test WHERE string LIKE 'asdf%'; -- will still use seqscan

I had to write a simple query where I go looking for people's name that start with a B or a D :   SELECT s.name  FROM spelers s  WHERE s.name LIKE 'B%' OR s.name LIKE 'D%' ORDER BY 1   I was wondering if there is a way to rewrite this to become more performant. So I can avoid or and / or like?


Is there way to show a menu based on the url provided?   For example:  sub1.test.com will provide menu A sub2.test.com will provide menu B   Kind of a multisite principle but without using the actual multisite.

my D7 site will be accessible from 4 different subdomains: - a.site.com - b.site.com - c.site.com - www.site.com (or just site.com)  I already enabled a domain cookie for .site.com and the login works across all subdomains.  Now I want to be able to show a different logo logo based on the subdomain and I also want to be able to switch the main menu links.  I tried the context module but didn't find a way to detect the subdomain.  I don't want to use the domain access module. I was thinking about modifying the theme to switch the logos. Can I do the same for the menu links?   Does anyone have a  better idea?


Running Ubuntu 17.10. Installed Synaptic Package Manager through Terminal, but it won't open -- just asks for my password and then immediately closes. Ultimately I'm trying to use it to install Zotero 5.0, so alternative routes to that are also welcome. Downloading through Zotero website leaves me with a desktop configuration file that's functional but buried in several layers of folders, and attempting to do it through a web-based curl yielded nothing at all.   Attempted running synaptic-pkexec and it produced an error message: "No Protocol specified. Tried synaptic  and it returned "Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged. Segmentation fault (core dumped)"

I installed Ubuntu 17.10. Now I am having trouble with gksu:  $ gksu -dg synaptic No ask_pass set, using default! xauth: /tmp/libgksu-HgUjgQ/.Xauthority STARTUP_ID: gksu/synaptic/8760-0-alex-XPS-15-9530_TIME4974977 cmd[0]: /usr/bin/sudo cmd[1]: -H cmd[2]: -S cmd[3]: -p cmd[4]: GNOME_SUDO_PASS cmd[5]: -u cmd[6]: root cmd[7]: -- cmd[8]: synaptic buffer: -GNOME_SUDO_PASS- brute force GNOME_SUDO_PASS ended... Yeah, we're in... Unable to init server: Could not connect: Connection refused (synaptic:8767): Gtk-WARNING **: cannot open display: :1 xauth: /tmp/libgksu-HgUjgQ/.Xauthority xauth_env: (null) dir: /tmp/libgksu-HgUjgQ   If I don't use -g, the password dialog is disabled. So looks like a problem with creating a tty for root.  Any advice?


For instance, since weight is given by mass x gravitational field strength and assuming both objects have the same gravitational field strength and the only changing variable is its mass, why do they fall at the same rate?

I'm far from being a physics expert and figured this would be a good place to ask a beginner question that has been confusing me for some time.  According to Galileo, two bodies of different masses, dropped from the same height, will touch the floor at the same time in the absence of air resistance.  BUT Newton's second law states that $a = F/m$, with $a$ the acceleration of a particle, $m$ its mass and $F$ the sum of forces applied to it.  I understand that acceleration represents a variation of velocity and velocity represents a variation of position. I don't comprehend why the mass, which is seemingly affecting the acceleration, does not affect the "time of impact".  Can someone explain this to me? I feel pretty dumb right now :)


I added an outline for the render with the Freestyle option on Blender 2.8, but when i zoom-in/out the camera, the line tends to maintain the same size, how can i make it change a little when i move the camera? (making the line not that bold when the camera is far away, for example)  Also, how can i 'choose' how much influence it will get? for instance, the shoes look weird in the last picture...

Im a beginner to use blender for comic     i try a way to make line on faraway object to be small but it still have a result like this. their are the way or some easy method to make a stacking line look doesn't black like this?


Almost all releases of Ubuntu comes with a pre-installed Mozilla Firefox. If we live boot from USB with Ubuntu, we will find Firefox at our use, but if we installed some other browser, for example Chromium, Google Chrome,or Opera, we will find them missing in the next live boot session, for obvious reasons.  Is there some way that I can keep an extra (not pre-provided/pre-installed) software (like those extra browsers) in the USB, so I will find them in every live boot session henceforth?  I would like to clear it up that, I don't wish to install Ubuntu in the USB, just want to find an extra software in live boot session.

I want to make a persistent live Ubuntu USB drive with more than 4GB of storage.   I know there is an option of installing directly on the drive but I don't want to do this as it will restrict the drive from working on different computers.   One option is to make an additional partition with extra space but if I do this how can I get newly installed software to be stored on this partition?


I have a click event that looks like this.      $( ".open_report" ).on( "click",function() {         console.log("on click");         //Do Stuff     });   it triggers on already created items, but not on new (dynamic) created items.  Except for the fact that the ids differ ( which it should) and that the data-report tag data differ, they are the same code. So I cant figure out why my on click event does not fire on dynamically added items.  loaded item which works

       Discharge Summary

       17-01-2018,19:57

       <input data-report="18109599-1516219070.html" type="button" class="removeButton buttons delete_report" value="x">

   dynamically added item

       Discharge Summary

       17-01-2018,20:01

       <input type="button" data-report="18109599-1516219273.html" class="removeButton buttons delete_report" value="x">

I have a bit of code where I am looping through all the select boxes on a page and binding a .hover event to them to do a bit of twiddling with their width on mouse on/off.  This happens on page ready and works just fine.  The problem I have is that any select boxes I add via Ajax or DOM after the initial loop won't have the event bound.  I have found this plugin (), but before I add another 5k to my pages with a plugin, I want to see if anyone knows a way to do this, either with jQuery directly or by another option.


What is the subject in the following sentence and is the verb agreement correct?  "There is an even number of rules."

Possible Duplicate:             There is a large number of labourers who want to migrate to Japan for work.   I type this sentence in a word processor, and it reports an error that "is" should be "are" (subject-verb agreement).  I doubt this is a valid error. Could anyone confirm this?


Packages like discord or vivaldi provide a .deb file which can be installed using apt install. Let's say in case of an update, how should one go about updating this package? I don't think these packages will be updated by a apt update && apt upgrade. Do we have to then manually download the new version, uninstall the previous version, and then install the new version? Sounds like a lot of work.

There are so many software which we installed via .deb file because official ubuntu repo has very old version of it. But I was just wondering how to update packages install via .deb file.  One particular example is sonic-visualiser The official ubuntu has 3 years old 2.5 version while the official site has 3.0.3 version


I'm developing a theme especially for Bānglā blog posting, and it'd be under GNU license. I questioned about a Calendar Widget translation with some problems today, and got a  saying:     I'm just wondering, is this not covered in the ?   And after the  I thought I can make a translation-ready theme. Then I can translate all the necessary Texts for my theme. I followed:   - by Konstantinos Kouratoras — WP.SmashingMagazine.com - by Robert Treacy — WP.TutsPlus.com   And now I made a complete translation-ready theme and it's working when I change the WPLANG to my language in wp-config.php. But except this step the whole thing is automatic. So if this step can be automatic, it'd be nice for me.  I want to place a filter that can hook the WPLANG and overwrite with bn_BD like:  define('WPLANG', 'bn_BD');   when the theme is activated.  So that I can simply say: "Install the theme, and it'll do everything for you. You don't need to have access into your cPanel to make change into the wp-config.php." I've read the WPSE thread , but if you now get me, I'm on a different track.  So, is that possible?

For a single site wordpress, the language must be set from wp-config.php's WPLANG, but is it possible to set from my plugin which override the default value?


For year 2016 I had like $6000 contribution room. The company I work for has accumulated $9000 in an account (accumulated benefit for 4 years)  and deposited the entire amount in February 2016 but after I maximized my contribution for 2015. That forces me to declare the $9000 entirely for 2016 and with that I am overcontributing with $3000.  Since we are now in 2017 and I have new contribution room in effect for this year do I have to withdraw the money? I understand that I will pay penalties for 2016 (which I might be able to waive if I write to CRA) but if I do not withdraw the $3000 in 2017 (because I have contribution room > $3000) will it count as overcontribution anymore or CRA will consider that I rebalanced and I will just have just $3k less contribution room for this year (2017) ?

If by mistake, I exceed the contribution limit to my RRSP, can I withdraw it from my RRSP, to avoid paying penalty? e.g Let us say my RRSP room is 18k, but I contributed 22k, so any contribution in excess of 2k, will be taxed at 1% per month. To avoid this, should I withdraw the excess money from my RRSP?


I'm interested to know how electric current carries energy. I understand that the huge amount of electrons pass at one point through conductor, but they move slowly. So I do not understand how much energy they have.

I'm interested in what kind of energy has electric current ?. For everything I taught in school should have kinetic energy because electrons are on a certain potential within the electric field when the switch is closed then the electrons move and the electric current is "generated" which then should have the kinetic energy. And so I was thinking all the time until I came across this article  which actually tells me that everything I know about the electric current is wrong On the other hand, I wonder if so many books from college ,schools, are spoken in the wrong way It's just a little weird that a huge number of scientists and engineers are actually talking nonsense all the time and so I hope that you can help me clarify my dilemma.  thanks in advance.


I connect to a lot of Linux servers with ssh and run a health check script on each, wanted to save myself 2 secs per server when doing so.  So instead of normally creating the script file:  cat > test.sh + right-click paste(whole script file -copied from notepad) + ctrl+c   I right click paste: here doc with whole script(copied form notepad):  cat <<'EOF' > test.sh #!/bin/bash commands.. commands.. EOF   Aprox 50% times script inside gets corrupted when pasted like this. Corruption occurs on random line/lines(part of line is missing, some characters are missing etc.) which results in syntax errors when script is run, other 50% times script is pasted OK and can be run OK.  Problem is definitely not in the script itself.  When it is copied cat > filename way, it works 100%. Notepad where the text is copied from uses UNIX - LF EOL conv. but this also happens when switched to windows CRLF type. Script has no tabs inside, just whitespaces also limitString has no leading whitespace before itself  Script is 430 lines long, could this be a problem?  I have been using same syntax for some time in some other bash scripts or directly in terminal but never experienced such behavior.  Anyone has ideas what might be causing this? Or possible workaround?

I have to run a local shell script (windows/Linux) on a remote machine. I have SSH configured on both machine A and B. My script is on machine A which will run some of my code on a remote machine, machine B. The local and remote computers can be either Windows or Unix based system. Is there a way to run do this using plink/ssh?


What is the relationship between gradient boosting and gradient decent? Are the closely related and how are they related to each other?

I am reading the useful Wikipedia entry on gradient boosting (), and try to understand how / why we can approximate the residuals by the steepest descent step (also called the pseudo-gradient). Can anyone give me the intuition on how the steepest descent is linked / similar to the residuals? Help much appreciated!


I am a foreigner currently living in the US, and I have a SSN due to my employment here. However, I will be returning to my home country next year. My question is: since I have an SSN, I am able to open a brokerage account at a US brokerage bank; then, if i return to my home country (say, permanently), but trade stocks through my US brokerage account and make a profit, what are my tax responsibilities? To which government do I pay taxes?

I'm a non-US citizen, and not residing in US, who uses an online brokerage firm to trade US stocks and options. Are my capital gains (short term and long term) and dividends subject to taxes? If yes, what are those taxes?


To give some background, I am currently a graduate student with a teaching assistantship and am teaching precalculus this semester. The department really pushes us to hammer the differences and similarities between degrees and radians and instances where you might use one over the other and so I am looking for some nice applications of both degrees and radians, but especially radians since most students are already comfortable with degrees. One of the main points the department likes us to make is that calculating arc length is much easier when working with radians as opposed to degrees, but I would like some additional examples.   I am at a larger state school and the audience is primarily first year college students or students taking math again for the first time in a couple of years, so ideally examples shouldn't be esoteric and require a lot of knowledge of mathematics; so things such as $$ \lim_{h \rightarrow 0} \frac{\sin(h)}{h} = 1$$ are not what I am looking for. Bonus points for examples where working with radians as opposed to degrees makes your life simpler.

I have learned about the correspondence of radians and degrees so 360° degrees equals $2\pi$ radians. Now we mostly use radians (integrals and so on)  My question: Is it just mathematical convention that radians are much more used in higher maths than degrees or do radians have some intrinsic advantage over degrees?  For me personally it doesn't matter if I write $\cos(360°)$ or $\cos(2\pi)$. Both equals 1, so why bother with two conventions?


I am confused with the following (Sorry if this is a duplicate):  Let $S$ be a real $n \times n$ symmetric matrix, which is diagonalizable, of course, and let its Jordan normal form  be $J=\text{diag}(\lambda_1,...,\lambda_n)$, where each $\lambda_i$ is an eigenvalue. Consider $M$ the change of basis, i.e. $M$ is an invertible matrix such that $S=M^{-1}JM$. We know it is possible to choose $M$ such that it is orthogonal, but can we guarantee that $M$ is always orthogonal?

I know that the symmetric matrix has orthogonal eigenvectors corresponding eigenvalues. Also, the eigenvectors from the same eigenvalue are linearly independent.  I need an example of symmetric matrix such that the eigenvectors from the same eigenvalue are not orthogonal.  Also, I know that the eigenvalues of the symmetric matrix are real. But , this statement true iff the entries are real numbers.Right? Since the matrix 2x2 $$A=\begin{bmatrix} 1 &i \\  i &1  \end{bmatrix}$$  has non real eigenvalues