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Torsten Ekedahl
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203
Answers
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40
From Zeta Functions to Curves
Jul 18 '11 at 10:01
40
Why worry about the axiom of choice?
Apr 29 '10 at 5:46
31
Separable and algebraic closures?
Jun 7 '10 at 8:47
30
Which groups have only real and quaternionic irreducible representations?
Nov 27 '10 at 11:34
27
Is there a machinery describing all the irreducible representations ?
Mar 18 '10 at 16:20
26
Symmetric powers and duals of vector bundles in char p
Aug 4 '10 at 13:21
23
How does Tate verify his own conjecture for the Fermat hypersurface?
May 13 '11 at 4:56
21
What do coherent topoi have to do with completeness?
Jun 21 '11 at 5:46
21
The role of completeness in Hilbert Spaces
Aug 17 '10 at 6:31
21
Why are normal crossing divisors nice?
May 6 '10 at 19:57
20
“Largest” finite-dimensional Lie subgroups of Diff(S^n), are they known?
Jun 13 '10 at 19:11
19
Which 'well-known' algebraic geometric results do not hold in characteristic 2?
Jul 6 '11 at 20:24
19
Motivic characterization of affine spaces
Oct 17 '10 at 14:21
19
What are some fundamental “sources” for the appearance of pi in mathematics?
Mar 14 '10 at 17:43
18
What is the wild fundamental group?
Jan 18 '11 at 7:27
18
Is $Sym^n (V^*) \cong Sym^n (V)^\ast$ naturally in positive characteristic?
Feb 15 '10 at 16:59
17
extensions, abelian varieties, $\mathbb{G}_m$
May 10 '11 at 5:41
17
Automorphism group of a scheme
Feb 10 '11 at 19:08
16
Analogue of Smith normal form for matrices over $\mathbb Z[t]$
Jan 13 '11 at 13:54
16
Projective variety with no syzygies but not isomorphic to projective space
Nov 6 '10 at 10:44
16
Where can I easily look up / calculate (abelian) group cohomology?
Oct 17 '10 at 8:43
16
projective module
May 23 '10 at 17:41
15
What about the empty torsor?
May 29 '11 at 17:33
15
Is the Characteristic of a Field Detectable from the Topology of a Topological Vector Space?
May 29 '11 at 5:18
15
Why does the Grothendieck group $K_0(R)$ of a ring not depend on our choice of using left modules instead of right modules?
Nov 19 '10 at 12:06
15
Is a polynomial group law on $\mathbb{R}^n$ automatically nilpotent?
Apr 17 '10 at 20:35
14
Central extensions of group schemes
Aug 23 '11 at 5:50
14
What about stacks of categories in algebraic geometry?
Mar 1 '11 at 6:33
14
Is every projective space bundle locally trivial in the Zariski topology?
Dec 31 '10 at 5:48
14
Torsors for finite group schemes
Nov 20 '10 at 7:35
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