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Questions
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When is this diagram of tensor powers an equalizer?

sep 8 at 11:21 Martin Brandenburg 29.1k●2●46●130

 
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Is 2 a zerodivisor in the ring parametrizing rank-n algebras?

aug 30 at 13:50 Owen Biesel 1,144●3●11

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Prime-like elements of rings

aug 19 at 2:08 Florian Eisele 1,271●3●9

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Why are free groups residually finite?

apr 8 12 at 2:24 Benjamin Steinberg 10.7k●1●14●49

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Generalizing the Fundamental Theorem of Symmetric Polynomials

feb 24 12 at 15:28 Abdelmalek Abdesselam 2,251●4●17

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Does $S$ being a free rank-$n$ $R$-algebra imply that $S/R$ is free rank $n-1$?

feb 20 12 at 21:05 Florian Eisele 1,271●3●9

 
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When can one extend a flat family from a subscheme to the whole scheme?

oct 1 10 at 13:29 mdeland 1,232●5●13