46

Questions

55
86
votes
7
answers
21k
views

Where to buy premium white chalk in the U.S., like they have at RIMS?

apr 3 at 4:57 Kyung 112

31
55
votes
26
answers
4k
views

What would you want on a Lie theory cheat poster?

jan 30 12 at 5:01 unknown (google) 5,540629

12
25
votes
2
answers
972
views

Are there “real” vs. “quaternionic” conjugacy classes in finite groups?

nov 25 10 at 6:42 Faisal 6,0911838

9
24
votes
2
answers
829
views

If a field extension gives affine space, was it already affine space?

jan 28 11 at 13:31 Allen Knutson 12.4k12364

3
14
votes
1
answer
728
views

Founding of homological without quite involving derived categories

jan 7 10 at 19:28 David Speyer 55.1k3102236

4
17
votes
4
answers
710
views

Topological spaces made by identifying opposite faces of a cube?

mar 6 12 at 0:02 Ryan Budney 21.6k140101

4
8
votes
3
answers
709
views

Can injective modules over R give non-injective sheaves over Spec R?

feb 24 12 at 13:42 Martin Brandenburg 29.1k245129

4
14
votes
1
answer
691
views

Why do flag manifolds, in the P(V_rho) embedding, look like products of P^1s?

mar 3 10 at 16:54 David Speyer 55.1k3102236

6
16
votes
1
answer
664
views

When does the relative differential $df=0$ imply that $f$ comes from the base?

sep 14 11 at 21:09 Qing Liu 8,5851726

7
19
votes
3
answers
600
views

What classification theorems have been improved by re-categorizing?

nov 22 at 2:51 Eugene Lerman 5756

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