To get the complex numbers, you take the real numbers and throw in a new number i that squares to -1. But other alternatives are also interesting! Different choices are connected to geometry in different ways. (1/n)pic.twitter.com/BdV8i14wmr
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I think this has officially skipped over my pond of knowledge.pic.twitter.com/saCNUA03Pk
I know it sounds complicated but they’re actually much simpler than real or complexes since they terminate after two powers
The subset that squares to zero can be thought of as containing infinitesimal numbrs This explains why f(x + epsilon) = f(x) + epsilon * f'(x) whenever epsilon^2 = 0 and f is any analytic function. One application of this is in "automatic differentiation" in computer programming
I find this perspective to be more intuitive than the other ones
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