S. Carnahan's user avatar
S. Carnahan's user avatar
S. Carnahan's user avatar
S. Carnahan
Moderator
  • Member for 14 years, 5 months
  • Last seen this week
98 votes
10 answers
23k views

Motivation for algebraic K-theory?

63 votes
4 answers
11k views

Is there a good way to think of vanishing cycles and nearby cycles?

37 votes
3 answers
5k views

Is there a nice proof of the fact that there are (p-1)/24 supersingular elliptic curves in characteristic p?

15 votes
6 answers
2k views

How do I describe a fusion category given a subfactor?

10 votes
3 answers
2k views

How do I describe the GL_n torsor attached to a smooth morphism of relative dimension n?

16 votes
2 answers
1k views

Is the tangent space functor from PD formal groups to Lie algebras an equivalence?

26 votes
4 answers
1k views

Are there lightweight foundations for arbitrarily extendable objects?

8 votes
4 answers
945 views

Does there exist a family of curves (or abelian varieties) on the punctured line with specified monodromy on H^1?

18 votes
1 answer
837 views

Can we reconstruct positive weight invariants in algebraic topology using algebraic geometry?

7 votes
2 answers
780 views

Are there interesting monoidal structures on representations of quantum affine algebras?

11 votes
1 answer
764 views

Is there a canonical map from the cohomology of orbifold chiral de Rham on an orbifold to the cohomology of chiral de Rham on a crepant resolution?

5 votes
2 answers
614 views

Where can I find an explicit description of the pseudocolimit of a small pseudofunctor to Cat?

8 votes
1 answer
560 views

Transmutation versus operads

8 votes
1 answer
489 views

Are associated bundles representable in schemes?

12 votes
0 answers
440 views

Where is the representability of the moduli of curves with framed points proved?

11 votes
1 answer
361 views

Can we glue characteristic 0 and characteristic p representations of a finite group given equality of (Brauer) characters?

9 votes
2 answers
352 views

Is there a subfactor construction involving 2-groups?

3 votes
1 answer
166 views

Do rational points in a split reductive group act transitively on the orbits of the Cartan subalgebra (w.r.t. automorphism group of Lie algebra)?

5 votes
0 answers
96 views

Is there a composite-order generalization of the homomorphism on Rep(Z/p) giving total dimension of Tate cohomology?