Title: I&#x27;m in my early thirties and I feel I&#x27;ve not really made any significant effort in learning math&#x2F;physics beyond the usual curriculum at school. I realize I didn&#x27;t have the need for it and didn&#x27;t have the right exposure (environment&#x2F;friends) that would have inculcated in me these things. And perhaps I was lazy as well all these years to go that extra mile.<p>I have (had) a fairly good grasp of calculus and trigonometry and did a fairly good job working on a number of problems in high school. But over the past 12-13 years, I&#x27;ve really not had any need to flex my math muscles other than a problem here or there at work. Otherwise it&#x27;s the same old enterprise software development.<p>I follow a bunch of folks on the internet and idolize them for their multifaceted personalities - be it math, programming&#x2F;problem solving, physics, music etc. And these people had a natural flair for math&#x2F;physics which was nurtured by their environment which made them participate in IOI&#x2F;ACPC etc. in high school and undergrad which unfortunately I didn&#x27;t get a taste of. I can totally see that these are the folks who have high IQs and they can easily learn a new domain in a few months if they were put in one.<p>Instead of ruing missed opportunities, I want to take it under my stride in my thirties to learn math&#x2F;physics so as to become better at it. I might not have made an effort till now, but I hopefully have another 40 years to flex my muscles. I believe I&#x27;m a little wiser than how I was a few years back, so I&#x27;m turning to the community for help.<p>How do I get started? I&#x27;m looking to (re)learn the following - calculus, linear algebra, constraint solving, optimization problems, graph theory, discrete math and slowly gain knowledge and expertise to appreciate theoretical physics, astrophysics, string theory etc.
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