32

Questions
votes newest views recent
6
14
votes
1
answer
749
views

Who first cared about singular points?

may 9 at 15:13 Rhett Butler 1,043●1●6●12

29
54
votes
2
answers
3k
views

When is the tensor product of two fields a field?

feb 15 at 7:06 Georges Elencwajg 24.3k●65●132

41
66
votes
12
answers
4k
views

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

feb 15 at 6:18 Georges Elencwajg 24.3k●65●132

9
39
votes
3
answers
1k
views

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

dec 21 at 3:37 George Lowther 9,408●1●24●44

13
27
votes
6
answers
6k
views

How many mathematicians are there?

dec 8 at 16:30 Alexandre Eremenko 10.6k●1●24●39

13
29
votes
2
answers
1k
views

When is a singular point of a variety smooth?

jun 29 at 12:38 Georges Elencwajg 24.3k●65●132

16
26
votes
6
answers
2k
views

Cubical vs. simplicial singular homology

may 19 at 16:47 Ronnie Brown 5,209●17●20

6
18
votes
3
answers
612
views

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

apr 20 12 at 21:23 Misha 12.5k●1●26●48

4
9
votes
2
answers
351
views

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

mar 13 12 at 8:18 Georges Elencwajg 24.3k●65●132

5
13
votes
3
answers
933
views

Did Grothendieck introduce vertical arrows that denote morphisms?

oct 31 11 at 22:25 Otis Chodosh 951●5●14

1 2 3 4 next