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Questions
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A learning roadmap for algebraic geometry

oct 18 11 at 14:12 Andreas Holmstrom 2,825●1●12●28

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Why are spectral sequences so ubiquitous?

oct 16 10 at 8:50 Greg Kuperberg 36.4k●2●117●179

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Do we still need model categories?

dec 25 11 at 23:53 Ronnie Brown 5,486●19●21

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Is there a high-concept explanation for why “simplicial” leads to “homotopy-theoretic”?

mar 20 11 at 18:35 Jonathan Chiche 1,441●1●7●17

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Does anyone know a polynomial whose lack of roots can’t be proved?

nov 27 11 at 5:47 Vladimir Reshetnikov 1,674●11●25

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What is a cup-product in group cohomology, and how does it relate to other branches of mathematics?

oct 19 09 at 8:50 S1 2,803●8●25

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A homotopy commutative diagram that cannot be strictified

dec 30 11 at 4:03 Dan Ramras 3,853●2●17●26

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Grothendieck’s Galois theory without finiteness hypotheses

jun 25 at 17:58 Eduardo Dubuc 201●1●4

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How to construct a topological conjugacy?

apr 3 10 at 20:32 Sergei Ivanov 22.7k●46●95

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What do cohomology operations have to do with the non-existence of commutative cochains over $\mathbb{Z}$?

sep 21 at 12:26 Justin Young 163●1●3

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