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# Questions

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### Are the two meanings of “undecidable” related?

5h ago Thomas Benjamin 41917

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### Terminology: complex of sheaves with cohomology sheaves concentrated in degree zero

18h ago Ryan Reich 3,8811925

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### Reference request: sheaves on closed sets

1d ago David Carchedi 7,7071027

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### Does a *topological* manifold have an exhaustion by compact submanifolds with boundary?

may 2 at 8:31 Liviu Nicolaescu 11.3k12033

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### Are there Maass forms where the expected Galois representation is $\ell$-adic?

apr 5 at 2:45 Marcelo Gómez Morteo 1

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### How to call a simplicial set where every boundary of a simplex can be filled?

apr 3 at 6:00 Eric Wofsey 8,86012646

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### Can the SL_2 character variety of a three-manifold be nonreduced?

mar 18 at 20:07 Misha 12.5k12648

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### Do the solutions of the Maurer--Cartan equation form a simplicial set?

mar 10 at 13:30 Fernando Muro 5,1411915

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### Is the free abelian group on an affine scheme represented by an ind-scheme?

mar 6 at 17:06 unknown (google) 5,530629

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