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# Questions

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### Who first cared about singular points?

may 9 at 15:13 Rhett Butler 1,0431612

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### When is the tensor product of two fields a field?

feb 15 at 7:06 Georges Elencwajg 24.3k65132

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### Why is the fundamental group of a compact Riemann surface not free ?

feb 15 at 6:18 Georges Elencwajg 24.3k65132

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### Does a power series converging everywhere on its circle of convergence define a continuous function?

dec 21 at 3:37 George Lowther 9,40812444

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### How many mathematicians are there?

dec 8 at 16:30 Alexandre Eremenko 10.6k12439

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### When is a singular point of a variety smooth?

jun 29 at 12:38 Georges Elencwajg 24.3k65132

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### Cubical vs. simplicial singular homology

may 19 at 16:47 Ronnie Brown 5,2091720

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### What is the Krull dimension of the ring of holomorphic functions on a complex manifold ?

apr 20 12 at 21:23 Misha 12.5k12648

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### What is the dimension of the product ring $\prod \mathbb Z/2^n\mathbb Z$ ?

mar 13 12 at 8:18 Georges Elencwajg 24.3k65132

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