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Questions
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Basis-free definition of Casimir element?

jul 16 11 at 17:49 paul garrett 6,624●17●26

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Errata for Atiyah-Macdonald

mar 8 at 2:58 Junyan Xu 178●1●4●8

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(Finite) Classification Theory

sep 19 10 at 15:10 Richard Borcherds 14.1k●2●54●82

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Heuristic argument that finite simple groups _ought_ to be “classifiable”?

jun 12 at 11:46 Gil Kalai 10.7k●6●80●144

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In what category is the sum of real numbers a coproduct?

apr 5 10 at 7:37 Dmitri Pavlov 6,973●1●13●44