I'm a pretty low-key annotator but I did write this in the margins of @stevenstrogatz's Infinite Powers.pic.twitter.com/2ze822F1a0
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Same ideas arise in Goursat’s proof of Cauchy’s theorem In complex analysis. I want to write an article called a telescopic look at calculus
It's interesting, too, how intimately Cauchy's theorem is linked to the Sperner lemma, which is a sort of combinatorial-topological counterpart of the algebro-arithmetic phenomenon of telescoping cancellation. Riemann and Klein especially were keenly conscious of these links.
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