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    <blockquote> <p>Of course I know the basics of algebra. Things like "normal" and square equations. Also the basics of geometry. But well, there are things that I have missed. And lately I am being fascinated by things like probability theory, infinity, chaos/order etc.</p> </blockquote> <p>I find that mathematics is a one-way door: if you don't get through early, it's hard to go back. It's not impossible to pick up, but it is more difficult without discipline. </p> <p>The key is doing problems. You don't just read math books - you do problems to work the mechanics into your brain. If you're just reading, I'd say it's impossible to learn it.</p> <p>Best to go back to what you know and work up. If you feel okay about basic algebra and geometry, start thinking about intro calculus or statistics. Start with the basic stuff: one variable differential and/or integral calculus or statistics. Do a lot of problems and get comfortable.</p> <p>If you're a computer scientist, you'll find discrete math, graphs, numerical methods, and linear algebra helpful.</p> <p>Don't expect to do it quickly, especially if you're casual about it.</p> <p>I'd recommend two wonderful resources: </p> <ol> <li><a href="http://cran.r-project.org/doc/contrib/Verzani-SimpleR.pdf" rel="nofollow noreferrer">Verzani - Using R for Introductory Statistics</a></li> <li><a href="http://ocw.mit.edu/OcwWeb/Mathematics/18-06Spring-2005/VideoLectures/index.htm" rel="nofollow noreferrer">Gil Strang MIT Linear Algebra</a></li> </ol> <p>Both are free; both are excellent.</p>
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    1. POHow do I become better in math, after being a programmer for several years
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    1. COThis is something I know (or at least suspect). But I don't mind. I don't try to become a maths professor. I just happen do like maths lately. Something like my new hobby :). As far as the problems are concerned, yeah, I like them (at least when they are not totally impenetrable :))
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    2. COOf course. You don't get anything out of impenetrable problems, but that's always relative to your ability. It says as much about you as it does the problems.
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