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Questions
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Why did people originally like Frobenius algebras?

jul 16 10 at 20:07 Kevin Lin 13k●2●34●115

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Where are some interesting places where the axiom of choice crops up in category theory?

aug 27 at 23:54 dmdmdmdmdmd 73●6

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When are modules and representations not the same thing?

jul 20 10 at 19:10 Victor Protsak 7,921●1●30●44

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Co-ends as a trace operation on profunctors

jun 27 11 at 23:32 Mike Stay 723●4●9

 
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Is it possible to define a graph that has two vertices that are infinitely far apart?

apr 30 10 at 0:37 Roy Maclean 650●4●19

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Computing colimits in a Lawvere theory

sep 20 at 13:27 David Carchedi 7,952●10●28

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Categories whose objects are CW-complexes

dec 16 11 at 18:21 Ronnie Brown 5,496●20●21

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What is the comultiplication of a matrix frobenius algebra?

oct 31 09 at 23:38 Theo Johnson-Freyd 22.9k●2●28●114

 
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Where does the “easy” definition of a weak n-category fail?

nov 10 09 at 19:16 Mike Shulman 17.4k●21●72

 
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Rig of fractions, including zero denominators

jan 13 11 at 22:16 Pace Nielsen 1,980●7●19

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