John Pardon

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

qa.quantum-algebra quantum-groups quantum-field-theory quantum-topology sg.symplectic-geometry asked Jan 27, 2012 at 5:08

mathoverflow.net

45 votes

Are the two meanings of "undecidable" related?

lo.logic computability-theory nt.number-theory asked May 16, 2013 at 5:30

mathoverflow.net

32 votes

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

rt.representation-theory lie-groups mp.mathematical-physics qa.quantum-algebra quantum-groups asked Sep 30, 2018 at 17:46

mathoverflow.net

29 votes

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

lo.logic computability-theory algorithms gr.group-theory asked Aug 31, 2011 at 23:53

mathoverflow.net

27 votes

Cobordism of orbifolds?

cobordism smooth-manifolds orbifolds gromov-witten-theory at.algebraic-topology asked Dec 5, 2012 at 18:48

mathoverflow.net

25 votes

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

modular-forms automorphic-forms rt.representation-theory maass-forms galois-representations asked Jun 5, 2012 at 22:22

mathoverflow.net

25 votes

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

homological-algebra convex-polytopes derived-category triangulated-categories chain-complexes asked Apr 17, 2016 at 21:33

mathoverflow.net

23 votes

Are there lots of integer homology three-spheres?

3-manifolds combinatorial-topology simplicial-complexes statistical-physics asked Feb 3, 2012 at 1:49

mathoverflow.net

23 votes

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

ag.algebraic-geometry rt.representation-theory lie-groups algebraic-groups modular-forms asked Aug 28, 2012 at 20:27

mathoverflow.net

22 votes

Pseudo-holomorphic curves in the six-sphere

sg.symplectic-geometry octonions pseudo-holomorphic-curves asked Sep 24, 2015 at 19:11

mathoverflow.net

Top Answers

I am Chinese. Which name is my surname and which is my last name, for a flight booking?

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Concurrent normals conjecture

mathoverflow.net

Can a tangle of arcs interlock?

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What is the usual topology of $C^\infty_c(M) $

mathoverflow.net

intuition for hochschild homology

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Journals and other sources with "easy reading" papers?

mathoverflow.net

Research directions in persistent homology

mathoverflow.net

Publishing conjectures

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Is there a continuous analogue of Ramanujan graphs?

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Is there a complex which computes Cech cohomology?

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Does Physics need non-analytic smooth functions?

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Why am I getting weird security questions with CLEAR?

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Grothendieck's Galois theory without finiteness hypotheses

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Number of critical points of smooth functions on $S^1$

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almost complex embedding of $S^2$ and $S^6$ into $\mathbb{C}^N$

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Lefschetz duality for non-compact relative manifolds

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What is the "analytic" analogue of the valuative criterion of properness

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Axiomatic characterization of virtual fundamental classes?

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Non-cyclotomic abelian extensions

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Does the centroid depend continuously on the curve?

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Eilenberg-MacLane Spaces of "large" groups

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Are dagger categories truly evil?

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Is Grothendieck a computer?

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Local structure of rational varieties

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Wildness of codimension 1 submanifolds of euclidean space

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Are there popular but poorly paved roads on Big Island which require an SUV?

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Can United make me pay for rebooking a flight cancelled due to snowstorm?

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What to do if a colleague is reviewing an unchanged paper that has been rejected before on my recommendation?

academia.stackexchange.com

Why are quasi-isomorphisms of homotopy algebras only defined for arity 1?

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Confusion regarding Riemann-Roch for vector bundles

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