16

Questions
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An ultrafilter is a set of subsets containing exactly one element of each finite partition: reference request

may 7 at 18:56 Butch Malahide 650●2●7

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Understanding Gibbs’s inequality

feb 25 at 18:44 Deane Yang 12.6k●1●33●80

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Do the elementary properties of mixed volume characterize it uniquely?

feb 9 at 11:09 Farhad 21●2

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Why are abelian groups amenable?

jan 9 at 11:35 Theo Buehler 3,666●1●11●25

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Finite order arithmetic and ETCS

dec 3 at 20:19 Tom Leinster 13.5k●1●40●82

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Square roots of the Laplace operator

sep 20 at 21:16 Luis Silvestre 322●1●5

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There are two slightly different notions of ultraproduct. Why is one said to be better than the other?

aug 25 at 13:09 Tom Leinster 13.5k●1●40●82

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Where is number theory used in the rest of mathematics?

aug 21 at 17:08 Kjetil B Halvorsen 916●4●8

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What are the algebras for the double dualization monad?

aug 16 at 16:50 Todd Trimble 22.3k●1●62●96

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How is the Julia set of $fg$ related to the Julia set of $gf$?

aug 7 at 16:06 Alexandre Eremenko 10.6k●1●24●39

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