User Chris Schommer-Pries

13 votes

0 answers

690 views

A tensor product for triangulated categories?

asked Jul 29, 2015 at 9:40

13 votes

2 answers

1k views

The cohomology plus what characterizes the rational homotopy type?

asked Mar 30, 2014 at 16:02

13 votes

1 answer

311 views

Does the Turaev-Viro theory for the generalized $E_6$ subfactor for $\mathbb{Z}/7$ distinguish $L(7,1)$ and $L(7,2)$?

asked May 26, 2016 at 16:18

13 votes

3 answers

3k views

What is the Theorem of the Cube?

asked Oct 11, 2009 at 16:59

13 votes

2 answers

2k views

An elementary question about adjunctions between presheaf categories preserving pullbacks.

asked Aug 3, 2010 at 20:07

12 votes

2 answers

1k views

Failure of Fin. Presented and Fin. Generated Modules to be Abelian Categories?

asked Apr 29, 2010 at 16:36

12 votes

1 answer

615 views

A linear category with objects of infinite length but which is otherwise finite?

asked Oct 23, 2014 at 8:12

11 votes

2 answers

1k views

Is the geometric realization of a level-wise weak equivalence a weak equivalence?

asked Jun 9, 2014 at 13:31

11 votes

0 answers

412 views

When can we tell if PROPs, Algebraic Theories, etc. are faithfully detected in a given category?

asked Sep 8, 2011 at 16:23

11 votes

1 answer

237 views

Are algebras with invertible linear duals always Frobenius?

asked Oct 13, 2020 at 17:39

11 votes

1 answer

1k views

Why does the internal singular simplicial space realize to the same thing as the discrete singular simplicial set?

asked Jan 7, 2010 at 8:50

11 votes

1 answer

604 views

Do h-coequalizers and coproducts give all h-colimits?

asked Jan 27, 2010 at 19:58

10 votes

2 answers

659 views

Homotopy equivalent smooth 4-manifolds which are not stably diffeomorphic?

asked Dec 10, 2020 at 16:35

10 votes

1 answer

281 views

Induced map on $H_4$ of Eilenberg–MacLane spaces

asked Sep 27, 2021 at 19:37

10 votes

2 answers

2k views

Segal's 1999 Stanford lecture notes on TQFT, where to find them?

asked Sep 2, 2015 at 7:43

10 votes

1 answer

669 views

Contractible and Delta-generated implies strong deformation retract to a point?

asked May 7, 2015 at 13:56

10 votes

3 answers

1k views

When is the projective model structure cartesian? When is the internal hom invariant?

asked Mar 6, 2013 at 10:09

10 votes

1 answer

1k views

What does the moduli stack of G-torsors over the multiplicative group look like?

asked Aug 5, 2013 at 15:47

9 votes

2 answers

448 views

How weird can Modular Tensor Categories be over non-algebraically closed fields?

asked Jul 16, 2014 at 13:35

9 votes

0 answers

953 views

Topologies on compactly supported functions

asked Oct 11, 2016 at 14:03

9 votes

1 answer

316 views

Framed version of the "copants bordism"?

asked Oct 2, 2021 at 19:02

8 votes

1 answer

820 views

Derived Category of the derived critical locus, is it the category of Matrix Factorizations?

asked Nov 1, 2019 at 20:07

8 votes

0 answers

316 views

A model category for E-infty algebras in a non-monoidal model category?

asked Feb 5, 2015 at 11:28

8 votes

1 answer

643 views

Explicit counter example to Vopěnka's principle in the constructible universe?

asked Apr 22, 2015 at 8:24

8 votes

4 answers

2k views

Is there a good notion of `Separated Stack'?

asked Jan 29, 2010 at 12:36

8 votes

3 answers

1k views

Derivations of C(X)? or Why Must Supermanifolds be Smooth?

asked Feb 16, 2010 at 14:11

8 votes

1 answer

452 views

Separable and finitely generated projective but not Frobenius?

asked Oct 22, 2009 at 20:28

8 votes

4 answers

748 views

Tensored Over Abelian Groups?

asked Dec 9, 2009 at 12:36

7 votes

3 answers

853 views

internal homs and adjunctions?

asked Oct 29, 2009 at 11:58

7 votes

1 answer

872 views

Whitehead Products without Base Points?

asked Feb 20, 2010 at 16:52

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74 Questions

A tensor product for triangulated categories?

The cohomology plus what characterizes the rational homotopy type?

Does the Turaev-Viro theory for the generalized $E_6$ subfactor for $\mathbb{Z}/7$ distinguish $L(7,1)$ and $L(7,2)$?

What is the Theorem of the Cube?

An elementary question about adjunctions between presheaf categories preserving pullbacks.

Failure of Fin. Presented and Fin. Generated Modules to be Abelian Categories?

A linear category with objects of infinite length but which is otherwise finite?

Is the geometric realization of a level-wise weak equivalence a weak equivalence?

When can we tell if PROPs, Algebraic Theories, etc. are faithfully detected in a given category?

Are algebras with invertible linear duals always Frobenius?

Why does the internal singular simplicial space realize to the same thing as the discrete singular simplicial set?

Do h-coequalizers and coproducts give all h-colimits?

Homotopy equivalent smooth 4-manifolds which are not stably diffeomorphic?

Induced map on $H_4$ of Eilenberg–MacLane spaces

Segal's 1999 Stanford lecture notes on TQFT, where to find them?

Contractible and Delta-generated implies strong deformation retract to a point?

When is the projective model structure cartesian? When is the internal hom invariant?

What does the moduli stack of G-torsors over the multiplicative group look like?

How weird can Modular Tensor Categories be over non-algebraically closed fields?

Topologies on compactly supported functions

Framed version of the "copants bordism"?

Derived Category of the derived critical locus, is it the category of Matrix Factorizations?

A model category for E-infty algebras in a non-monoidal model category?

Explicit counter example to Vopěnka's principle in the constructible universe?

Is there a good notion of `Separated Stack'?

Derivations of C(X)? or Why Must Supermanifolds be Smooth?

Separable and finitely generated projective but not Frobenius?

Tensored Over Abelian Groups?

internal homs and adjunctions?

Whitehead Products without Base Points?