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John Pardon
  • Member for 11 years, 1 month
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64 votes
4 answers
8k views

Why hasn't anyone proved that the two standard approaches to quantizing Chern-Simons theory are equivalent?

33 votes
5 answers
3k views

Are the two meanings of "undecidable" related?

32 votes
1 answer
1k views

Limiting representation theory of quantum groups at roots of unity and $SL(2,\mathbb{C})$

29 votes
3 answers
2k views

Is it decidable whether or not a collection of integer matrices generates a free group?

27 votes
2 answers
2k views

Cobordism of orbifolds?

25 votes
1 answer
3k views

Are there Maass forms where the expected Galois representation is $\ell$-adic?

25 votes
2 answers
1k views

Complete the following sequence: point, triangle, octahedron, . . . in a dg-category

23 votes
0 answers
2k views

Are there lots of integer homology three-spheres?

22 votes
3 answers
2k views

Is SL(2,C)/SL(2,Z) a quasi-projective variety?

22 votes
3 answers
2k views

Does a *topological* manifold have an exhaustion by compact submanifolds with boundary?

22 votes
1 answer
744 views

Pseudo-holomorphic curves in the six-sphere

20 votes
1 answer
2k views

Gauss linking integral and quadratic reciprocity

20 votes
2 answers
766 views

Can a finite group action by homeomorphisms of a three-manifold be approximated by a smooth action?

20 votes
1 answer
1k views

Why is there a unique hyperbolic simplex of largest area?

19 votes
2 answers
3k views

How many definitions are there of the Jones polynomial?

17 votes
3 answers
2k views

Is there an algebraic construction of the Quillen (determinant) Line Bundle?

17 votes
3 answers
2k views

How to calculate the Witten-Reshetikhin-Turaev invariants from a triangulation?

17 votes
4 answers
2k views

High multiplicity eigenvalue implies symmetry?

17 votes
1 answer
996 views

Categorification of Floer homology

16 votes
4 answers
1k views

Can you tell the volume of a symplectic manifold from the Poisson brackets?

15 votes
0 answers
1k views

Representations of quantum groups at roots of unity

15 votes
1 answer
943 views

Can the SL_2 character variety of a three-manifold be nonreduced?

15 votes
2 answers
3k views

How do I get the correct long exact sequence for relative group cohomology in terms of derived functors?

15 votes
1 answer
657 views

When can a contractible 2-complex be embedded in R^3?

15 votes
0 answers
1k views

Katz--Mazur for abelian varieties

15 votes
0 answers
313 views

Is tightness decidable?

14 votes
1 answer
732 views

Is there a category whose isomorphisms are precisely the simple homotopy equivalences?

14 votes
0 answers
252 views

Homotopy type of spaces of functions with few critical points

14 votes
2 answers
1k views

Which definition of "proper" is better?

14 votes
2 answers
734 views

Projective modules over quantum groups

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