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Questions
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Is {Ø,{Ø},{Ø,{Ø}}, … } the only known universe?

jul 31 10 at 17:09 Andreas Blass 33k●4●54●109

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2-TQFT are to Frobenius Algebras as ??? are to Hopf Algebras

jun 22 at 1:49 Carlos Segovia 1

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Fundamental group of R^2 minus the (ir)rationals

nov 20 10 at 22:44 Jeremy Brazas 1,516●1●5●12

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Flux through a Mobius strip

jan 9 11 at 3:04 KConrad 17k●3●61●117

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Does $\pi_1$ have a right adjoint?

nov 8 10 at 22:30 Jeremy Brazas 1,516●1●5●12

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The open problem of nth quantization

jan 13 12 at 0:55 tetrapharmakon 899●2●11

 
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Is the subobject functor really a presheaf?

sep 3 10 at 10:24 Peter Arndt 6,888●18●42

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Understanding Penrose diagrammatical notation

apr 16 at 21:01 Aleks Kissinger 951●3●11

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“orthogonal” and “parallel” morphisms?

mar 17 11 at 17:05 tetrapharmakon 899●2●11

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A fibrant-objects structure on Top

apr 1 at 20:32 David White 4,860●1●20●27

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