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# Questions

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### How to construct a topological conjugacy?

apr 3 10 at 20:32 Sergei Ivanov 22.8k4695

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### When is a Riemannian manifold an open subset of a complete one?

apr 5 10 at 3:23 Deane Yang 12.6k13482

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### Brown representability beyond CW complexes

nov 29 10 at 15:35 Sergey Melikhov 3,7221219

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### What is the geometric significance of Cartan’s structure equations?

nov 3 09 at 0:04 Urs Schreiber 6,7351422

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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 2,803825

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### Local cohomology, the formal function theorem, and a relative form of Lichtenbaum’s theorem

jan 21 11 at 3:08 Akhil Mathew 12.1k22989

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### What is the homotopy theory of categories?

apr 17 11 at 8:20 Jonathan Chiche 1,4411717

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926
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### Sheaf cohomology and inverse limits

may 17 11 at 16:37 Akhil Mathew 12.1k22989

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291
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### A model category of spaces where strict commutative monoids are $E_\infty$-spaces

apr 2 12 at 17:25 Mike Shulman 17.4k2172

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