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Kevin Walker
http://canyon23.net/math/
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Top Questions
29
votes
triangulated vs. dg/A-infinity
homological-algebra
a-infinity-algebras
homotopy-theory
asked Oct 17 '09 at 0:21
mathoverflow.net
21
votes
Brauer Groups and K-Theory
at.algebraic-topology
kt.k-theory-homology
asked Feb 2 '12 at 16:45
mathoverflow.net
17
votes
Group cochains invariant under the action of the symmetric group
reference-request
at.algebraic-topology
gr.group-theory
finite-groups
group-cohomology
asked Jan 8 '14 at 20:02
mathoverflow.net
16
votes
Explicit constructions of K(G,2)?
gt.geometric-topology
at.algebraic-topology
asked Apr 13 '11 at 14:07
mathoverflow.net
15
votes
References for homotopy colimit
reference-request
ct.category-theory
gn.general-topology
homotopy-theory
limits-and-colimits
asked Oct 13 '09 at 21:16
mathoverflow.net
14
votes
Can you name these orthogonal polynomials?
orthogonal-polynomials
rt.representation-theory
asked Mar 5 '12 at 23:56
mathoverflow.net
14
votes
Time reversal symmetry and T^2 = -1
quantum-field-theory
symmetry
fermions
spin-statistics
time-reversal
asked Jan 20 '12 at 18:00
physics.stackexchange.com
14
votes
Non-split Aut(G) $\to$ Out(G)?
gr.group-theory
finite-groups
automorphism-groups
outer-automorphisms
asked Feb 20 '18 at 15:08
mathoverflow.net
13
votes
Categorification of coends and ends
reference-request
ct.category-theory
higher-category-theory
asked Sep 4 '12 at 15:43
mathoverflow.net
13
votes
Langlands duality and multiplying cocharacters
rt.representation-theory
lie-groups
geometric-langlands
asked Nov 20 '14 at 14:15
mathoverflow.net
1
2
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Top Answers
35
Where is number theory used in the rest of mathematics?
mathoverflow.net
34
Thurston's “tinker toy” problem
mathoverflow.net
31
Cubical vs. simplicial singular homology
mathoverflow.net
27
Why hasn't anyone proved that the two standard approaches to quantizing Chern-Simons theory are equivalent?
mathoverflow.net
23
Are higher categories useful?
mathoverflow.net
22
Operations via Morse Theory
mathoverflow.net
21
Geometric model for classifying spaces of alternating groups
mathoverflow.net
21
What's the current state of the classification of not-fully-extended TQFTs?
mathoverflow.net
19
How to Tackle the Smooth Poincare Conjecture
mathoverflow.net
17
Are there any differences between “oval” and “ellipse”?
english.stackexchange.com
17
Relation between fully-extended TQFT and a “topless” TQFT
mathoverflow.net
16
How are the Walker-Wang TQFT and the Crane-Yetter TQFT related?
mathoverflow.net
14
How to calculate the Witten-Reshetikhin-Turaev invariants from a triangulation?
mathoverflow.net
14
A Pachner complex for triangulated manifolds
mathoverflow.net
14
heegard diagram
mathoverflow.net
13
Do all 3D TQFTs come from Reshetikhin-Turaev?
mathoverflow.net
13
A soft introduction to physics for mathematicians who don't know the first thing about physics
mathoverflow.net
13
Picturing a Certain Torus and Klein Bottle
mathoverflow.net
12
Does there exist a discrete gauge theory as a TQFT detecting the figure-8 knot?
mathoverflow.net
12
Maximal exotic $\mathbb{R}^4$
mathoverflow.net
12
4D TQFT from a modular tensor category
mathoverflow.net
12
3-manifolds bounded by a non-compact Riemann surface of genus 0
mathoverflow.net
11
Why can't we take three loops?
mathoverflow.net
11
How many mathematicians are there?
mathoverflow.net
11
“Dirty” proof that Eilenberg-MacLane spaces represent cohomology?
mathoverflow.net
11
Is the endomorphism algebra of a dualizable bimodule necessarily finite dimensional?
mathoverflow.net
11
Geometric interpretation of the Pontryagin square
mathoverflow.net
10
What's the right way to think about “anomalies” in 3d TQFTs?
mathoverflow.net
10
In knot theory: Benefits of working in $S^3$ instead of $\mathbb{R}^3$?
mathoverflow.net
10
Anomalies in the definition of Turaev's TQFT
mathoverflow.net
1
2
3
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