Recently I've been reading this (http://math.ucr.edu/home/baez/einstein/einstein.html) link talking about general relativity, Einstein's theory of gravity. Relativity is infamous for using some very gnarly math that made even Einstein's head hurt, but this link is a great reminder that relativity is a fundamentally physical theory that you can understand intuitively. It just happens that, once you understand the intuition and need to do a calculation, tensor calculus on Lorentzian manifolds is the "natural" way to do it. But as this link shows, you can state relativity without using heavyhanded math, and you can derive at least some results without the full mathematical formalism. Cool stuff.
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This blog features a series of miniessays about the history and nature of math, and how it fits into the spectrum of human activity. I'm considering putting them together into a book, so comments are encouraged! Archives
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