22

Questions

10
20
votes
5
answers
3k
views

What is the etymology of the term “perverse sheaf”?

oct 29 10 at 15:59 mark goresky 57654

12
36
votes
6
answers
3k
views

Geometric proof of the Vandermonde determinant?

mar 7 11 at 21:06 Daniel Litt 8,19922549

14
30
votes
9
answers
3k
views

What is the shortest program for which halting is unknown?

oct 4 at 16:06 Lew Baxter 1

34
63
votes
3
answers
2k
views

What do the stable homotopy groups of spheres say about the combinatorics of finite sets?

feb 28 12 at 10:26 Johannes Ebert 11.5k3356

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14
votes
2
answers
1k
views

Structure theorems for Turing-decidable languages?

jul 23 10 at 1:23 Kaveh 2,187524

4
8
votes
2
answers
1k
views

Noncombinatorial proofs of Ramsey’s Theorem?

jun 25 10 at 0:12 Terry Tao 28k4108183

1
2
votes
2
answers
1k
views

Proofs of Lower Bounds for Ramsey Numbers?

jun 25 10 at 20:04 Yemon Choi 8,45611945

2
4
votes
1
answer
871
views

Solving a Diophantine equation related to Algebraic Geometry, Steiner systems and $q$-binomials?

jun 27 10 at 2:48 Max Alekseyev 1,66949

4
21
votes
1
answer
603
views

Strong group ring isomorphisms

apr 6 11 at 7:46 Daniel Litt 8,19922549

4
10
votes
1
answer
576
views

Analytic Torsion in the Derived Category

mar 15 11 at 17:47 Daniel Litt 8,19922549

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