If I had to put the recipe for genius into one sentence, that might be it: to have a disinterested obsession with something that matters.

In June 1983, Alexander Grothendieck sits down to write the preface to a mathematical manuscript called Pursuing Stacks . He is concerned by what he sees as a tacit disdain for the more “feminine side” of mathematics (which is related to what I’m calling the solitary creative state) in favor of the “hammer and chisel” of the finished theorem. By el

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