User Andi Bauer

21 votes

1 answer

1k views

Fully extended TQFT and lattice models

asked Jun 11, 2019 at 20:23

12 votes

3 answers

590 views

Is there a discrete lattice analogue of conformal transformations?

asked Jul 9, 2018 at 21:01

11 votes

1 answer

620 views

Importance of the principal bundle in Chern-Simons theory

asked Jun 21, 2019 at 14:30

11 votes

2 answers

515 views

What are the topological phases of quantum Hall systems?

asked Jun 27, 2019 at 21:37

10 votes

2 answers

624 views

What do "pivotal" and "spherical" mean for (unitary) fusion categories on the level of the $F$-symbols?

asked Feb 3, 2018 at 11:37

10 votes

1 answer

387 views

Are all degree-1 cohomology operations Bocksteins?

asked Jan 28, 2022 at 19:46

9 votes

1 answer

322 views

Is there a simple argument that shows that two unitary fusion categories are Morita equivalent if their Drinfeld centers are equal?

asked May 3, 2018 at 21:21

9 votes

3 answers

383 views

Are there invariants of cell complexes similar to the Euler characteristic?

asked Jul 9, 2018 at 20:24

9 votes

1 answer

366 views

Generators and relations for the 2-dimensional unoriented cobordism category

asked Apr 24, 2020 at 19:48

8 votes

0 answers

162 views

Is there a combinatorial representation of general topological manifolds similar to triangulations?

asked Oct 20, 2020 at 14:11

8 votes

1 answer

347 views

Analogue of Bockstein for crossed module extensions and higher Steenrod square

asked Jan 19, 2022 at 12:50

7 votes

0 answers

114 views

Are there attempts to numerically finding algebraic structures over finite-dimensional vector spaces?

asked Dec 16, 2020 at 14:46

7 votes

0 answers

148 views

What are the generators and relations of the conformal cobordism category?

asked Dec 26, 2021 at 18:08

7 votes

0 answers

259 views

Why are Levin-Wen/Turaev-Viro models said to be non-chiral?

asked May 21, 2018 at 16:37

7 votes

2 answers

329 views

How do I calculate the modular fusion category from a given Lie algebra and level in Chern-Simons theory?

asked Sep 13, 2018 at 21:58

6 votes

2 answers

245 views

Are there examples of finite-dimensional weak Hopf C*-algebras with non-involutive antipode?

asked Jan 14, 2018 at 10:44

6 votes

1 answer

151 views

Tensor product of unit and co-unit in a closed compact category

asked Jul 23, 2020 at 14:56

6 votes

3 answers

325 views

Original reference for generators and relations of 2-dimensional TQFT

asked May 20, 2022 at 21:59

5 votes

1 answer

232 views

Are there irreducible multi-fusion categories that are not fusion categories?

asked Mar 4, 2019 at 17:07

5 votes

0 answers

227 views

Does Dijkgraaf-Witten theory have a time-reversal symmetry?

asked Jun 22, 2019 at 9:19

4 votes

0 answers

209 views

What is the value of the partition function of CFT on a compact conformal manifold?

asked Oct 23, 2019 at 16:03

4 votes

2 answers

342 views

Is every conformal manifold equivalent to a flat one with cone singularities?

asked Nov 17, 2019 at 10:33

4 votes

0 answers

193 views

Can non-chiral 3D TQFTs be extended to non-orientable manifolds whereas chiral ones cannot?

asked Mar 21, 2018 at 12:52

4 votes

1 answer

153 views

Automated rewriting of string diagrams in symmetric monoidal categories

asked May 19, 2020 at 17:32

4 votes

0 answers

203 views

Classification of special symmetric Frobenius algebras over real vector spaces

asked Dec 4, 2020 at 14:29

4 votes

1 answer

205 views

What is a sufficient set of links in a simplicial complex to represent any PL manifold?

asked Feb 7, 2020 at 22:20

4 votes

2 answers

308 views

Are there examples of finite-dimensional complex non-semisimple non-commutative symmetric Frobenius algebras?

asked Mar 13, 2021 at 15:18

4 votes

0 answers

107 views

Is there a local simplicial formula for the Steenrod squares which commutes with the derivative on cochain level?

asked Jan 20, 2022 at 23:16

4 votes

0 answers

183 views

Multi-variable cohomology operations

asked Jan 27, 2022 at 13:19

4 votes

0 answers

134 views

Combinatorial fiber bundles

asked Jan 18, 2022 at 20:30

Stack Exchange Network

52 Questions

Fully extended TQFT and lattice models

Is there a discrete lattice analogue of conformal transformations?

Importance of the principal bundle in Chern-Simons theory

What are the topological phases of quantum Hall systems?

What do "pivotal" and "spherical" mean for (unitary) fusion categories on the level of the $F$-symbols?

Are all degree-1 cohomology operations Bocksteins?

Is there a simple argument that shows that two unitary fusion categories are Morita equivalent if their Drinfeld centers are equal?

Are there invariants of cell complexes similar to the Euler characteristic?

Generators and relations for the 2-dimensional unoriented cobordism category

Is there a combinatorial representation of general topological manifolds similar to triangulations?

Analogue of Bockstein for crossed module extensions and higher Steenrod square

Are there attempts to numerically finding algebraic structures over finite-dimensional vector spaces?

What are the generators and relations of the conformal cobordism category?

Why are Levin-Wen/Turaev-Viro models said to be non-chiral?

How do I calculate the modular fusion category from a given Lie algebra and level in Chern-Simons theory?

Are there examples of finite-dimensional weak Hopf C*-algebras with non-involutive antipode?

Tensor product of unit and co-unit in a closed compact category

Original reference for generators and relations of 2-dimensional TQFT

Are there irreducible multi-fusion categories that are not fusion categories?

Does Dijkgraaf-Witten theory have a time-reversal symmetry?

What is the value of the partition function of CFT on a compact conformal manifold?

Is every conformal manifold equivalent to a flat one with cone singularities?

Can non-chiral 3D TQFTs be extended to non-orientable manifolds whereas chiral ones cannot?

Automated rewriting of string diagrams in symmetric monoidal categories

Classification of special symmetric Frobenius algebras over real vector spaces

What is a sufficient set of links in a simplicial complex to represent any PL manifold?

Are there examples of finite-dimensional complex non-semisimple non-commutative symmetric Frobenius algebras?

Is there a local simplicial formula for the Steenrod squares which commutes with the derivative on cochain level?

Multi-variable cohomology operations

Combinatorial fiber bundles