36

Questions
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Various concepts of “closure” or “completion” in mathematics

feb 25 10 at 8:23 gowers 17.9k●9●79●133

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Factorization of elements vs. of ideals, and is being a UFD equivalent to any property which can be stated entirely without reference to ring elements?

dec 5 09 at 5:12 Pete L. Clark 40k●4●103●227

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Tensor product is to flat as Hom is to ?

jan 7 10 at 7:44 Emerton 39.1k●4●120●198

 
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The natural inclusion of an infinite abelian group $G$ into $\widehat{\widehat{G}}$

mar 1 11 at 12:43 Matthew Daws 5,547●1●8●29

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If K/k is a finite normal extension of fields, is there always an intermediate field F such that F/k is purely inseparable and K/F is separable?

jul 11 11 at 16:16 Georges Elencwajg 24.6k●66●132

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Slightly weakened / altered concepts of a field

mar 2 10 at 17:04 Felipe Voloch 16.7k●2●36●61

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714
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Can we relate Cech cohomology and derived functor cohomology even when the cover we choose isn’t nice?

apr 8 11 at 14:25 Harry Gindi 8,948●2●33●97

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When does the group of invertible ideal quotients = the free abelian group on the prime ideals?

jun 26 10 at 6:12 Pete L. Clark 40k●4●103●227

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Gamma function versions of combinatorial identites?

jan 21 10 at 22:06 David Speyer 56.3k●3●103●242

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902
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Converse to Hilbert basis theorem?

feb 13 10 at 5:39 Pete L. Clark 40k●4●103●227

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