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43 Questions

Votes Activity Newest Views
3
21
votes
1
answer
840
views

Definition of an n-category

reference-request ct.category-theory homotopy-theory higher-category-theory quantum-field-theory
Oct 25 at 1:44 Student 2,443
5
15
votes
2
answers
1k
views

Formal definition of homotopy type theory

lo.logic foundations definitions homotopy-type-theory
Oct 12 at 11:47 Peter LeFanu Lumsdaine 12.2k
5
12
votes
2
answers
805
views

A toy model in 0-d QFT

co.combinatorics quantum-field-theory perturbation-theory feynman-integral
Oct 17 '19 at 18:22 Qfwfq 20.4k
5
11
votes
3
answers
729
views

Does Morita theory hint higher modules for noncommutative ring?

higher-category-theory noncommutative-algebra noncommutative-rings morita-equivalence morita-theory
Jul 21 at 13:37 Theo Johnson-Freyd 46.4k
3
10
votes
3
answers
508
views

Subalgebra of a group algebra

gr.group-theory rt.representation-theory hopf-algebras noncommutative-algebra
Jun 3 '19 at 19:52 Marco Farinati 858
3
8
votes
1
answer
297
views

DW, state sum models, and fully extended TQFTs

at.algebraic-topology higher-category-theory qa.quantum-algebra quantum-groups topological-quantum-field-theory
Apr 20 at 19:46 Noah Snyder 24.2k
2
8
votes
3
answers
361
views

Classification of $\operatorname{Rep} D(G)$

rt.representation-theory finite-groups qa.quantum-algebra quantum-groups hopf-algebras
Dec 12 '19 at 18:01 Student 2,443
6
8
votes
1
answer
941
views

What do physicists mean by a topological quantum gravity theory

mp.mathematical-physics topological-quantum-field-theory gravity-theory
Nov 10 '19 at 2:21 AccidentalFourierTransform 1,689
2
7
votes
1
answer
232
views

Combinatorial meaning of Kazhdan-Lusztig-Stanley polynomial

ag.algebraic-geometry co.combinatorics rt.representation-theory higher-category-theory matroid-theory
Oct 2 at 14:36 Student 2,443
1
7
votes
2
answers
192
views

Representations of $D(G)$ as an object in the center of $\operatorname{Rep}(G)$

finite-groups qa.quantum-algebra quantum-groups hopf-algebras drinfeld-center
Dec 22 '19 at 4:02 Student 2,443
3
7
votes
3
answers
721
views

Meaning of A-infinity relations

ct.category-theory soft-question higher-category-theory fukaya-category
Oct 1 '19 at 19:44 Denis T. 2,721
2
6
votes
2
answers
495
views

1-dimensional pure gauge theory

mp.mathematical-physics topological-quantum-field-theory gauge-theory classifying-spaces quantization
Oct 14 '19 at 3:08 Student 2,443
1
5
votes
1
answer
197
views

Rank of a finite group and its representations

gr.group-theory rt.representation-theory finite-groups monoidal-categories completion
Dec 30 at 1:15 Benjamin Steinberg 29k
 
5
votes
2
answers
220
views

A specific property of bi-adjunction

ct.category-theory monads adjoint-functors
Nov 22 at 22:16 Qiaochu Yuan 103k
3
5
votes
0
answers
168
views

Cohomology without comonad?

homotopy-theory cohomology higher-category-theory universal-algebra monads
Nov 19 at 20:08 Student 2,443
2
5
votes
0
answers
75
views

Representations of 2-groups and quantum double constructions

qa.quantum-algebra quantum-field-theory characters groupoids higher-algebra
Sep 15 at 19:25 Student 2,443
4
5
votes
1
answer
245
views

Nowhere vanishing section implies reduction of structure group

riemannian-geometry vector-bundles holonomy obstruction-theory
Jun 13 at 18:02 Community♦ 1
1
5
votes
2
answers
392
views

Kan fibrant replacement for a sphere

at.algebraic-topology homotopy-theory
May 2 at 23:42 Phil Tosteson 2,752
4
5
votes
1
answer
179
views

Classification of $\operatorname{Rep}D(H)$

reference-request rt.representation-theory qa.quantum-algebra hopf-algebras topological-quantum-field-theory
Feb 11 '20 at 5:59 Konstantinos Kanakoglou 6,426
3
5
votes
1
answer
219
views

Combinatorial Skeleton of a Riemannian manifold

co.combinatorics graph-theory riemannian-geometry sp.spectral-theory trace-formula
Oct 31 '19 at 17:18 Sophie MacDonald 305
1
5
votes
0
answers
191
views

Poking into a Lie group with your finger

lie-groups fourier-analysis sp.spectral-theory perturbation-theory flows
Oct 24 '19 at 1:48 Student 2,443
1
5
votes
0
answers
76
views

Uniqueness of Witten-Dijkgraaf 2D TQFT at 0th dimension

higher-category-theory quantum-field-theory principal-bundles gauge-theory
Oct 14 '19 at 20:56 Student 2,443
4
5
votes
3
answers
314
views

Electromagnetism as a $U(1)$-gauge theory

reference-request characteristic-classes gauge-theory
Oct 9 '19 at 17:50 thedude 919
2
4
votes
0
answers
169
views

Cohomology and higher structures

ra.rings-and-algebras lie-algebras cohomology lie-algebra-cohomology higher-algebra
May 19 at 11:03 Student 2,443
1
4
votes
1
answer
153
views

Group representation with algebra structure

rt.representation-theory ra.rings-and-algebras topological-quantum-field-theory
Nov 21 '19 at 17:43 Community♦ 1
1
3
votes
1
answer
126
views

Do (co)density (co)monadic constructions stablize?

ct.category-theory homotopy-theory monads kan-extension
Dec 11 at 9:27 Gregory Arone 6,448
 
3
votes
1
answer
194
views

Is Cauchy completion the largest extension with the same free cocompletion?

ct.category-theory limits-and-colimits completion yoneda-lemma
Dec 10 at 10:02 Student 2,443
1
3
votes
0
answers
97
views

Can chain homotopy induce space homotopy at $E_\infty$ level?

at.algebraic-topology ct.category-theory higher-category-theory a-infinity-algebras
May 14 at 1:53 Student 2,443
 
3
votes
0
answers
90
views

Generalizing the heat kernel approach

ap.analysis-of-pdes differential-operators integral-kernel
Nov 9 '19 at 1:57 Student 2,443
 
3
votes
0
answers
78
views

Macdonald's idea of his kth weight

rt.representation-theory riemannian-geometry special-functions symmetric-functions
Sep 4 '19 at 23:12 Student 2,443
1
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