User Reid Barton

5 votes

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Simplicially enriched cartesian closed categories

answered Feb 11, 2019 at 5:56

5 votes

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What structure of a monoidal simplicial model category is preserved by taking the opposite category?

answered Mar 8, 2019 at 15:05

5 votes

Coend computation continued

answered Apr 7, 2010 at 2:51

4 votes

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Does every cocontinuous functor between categories of presheaves on small categories have a right adjoint?

answered Apr 14, 2010 at 17:39

4 votes

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left quillen functor and fibrant objects

answered Nov 26, 2018 at 13:09

4 votes

Connecting $2n$ points in $\mathbb R^2$ with line segments s.t. each point belongs to exactly one line segment

answered Apr 12, 2022 at 15:52

4 votes

Accepted

Sheaves on sites given by a (regular) cd-structure

answered May 6, 2021 at 14:34

4 votes

What structure on a monoidal category would make its 2-category of module categories monoidal and braided?

answered Nov 10, 2009 at 7:14

4 votes

What are the endofunctors on the simplex category?

answered Nov 1, 2009 at 20:25

4 votes

triangulated vs. dg/A-infinity

answered Oct 17, 2009 at 19:35

4 votes

Accepted

What is the homology of the real coordinate ring of SO(n,R)? Other compact matrix groups?

answered Oct 22, 2009 at 7:07

4 votes

Is there a topological description of combinatorial Euler characteristic?

answered Oct 19, 2009 at 18:55

4 votes

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Characterizing triangles unembeddedly

answered Oct 20, 2009 at 2:30

4 votes

analog of principle of inclusion-exclusion

answered Oct 20, 2009 at 2:39

4 votes

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Can the objects of every concrete category themselves be realized as small categories?

answered Oct 19, 2009 at 7:01

4 votes

What is the "right" definition of the free abelian group on a set?

answered Nov 23, 2009 at 3:42

4 votes

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Naturally definable sets of natural numbers

answered Feb 3, 2010 at 18:22

4 votes

is localization of category of categories equivalent to |Cat|

answered Dec 29, 2009 at 16:17

4 votes

Logical problems in category theory

answered Jan 2, 2010 at 22:53

3 votes

Which Banach spaces have categorical duals?

answered Jan 5, 2010 at 18:44

3 votes

Terminology: Is there a name for a category with biproducts?

answered Jan 20, 2010 at 14:49

3 votes

Explicit description of a free braided monoidal groupoid with inverses

answered Nov 11, 2009 at 21:04

3 votes

References/literature for pushouts in category of commutative monoids? [ed. - amalgams]

answered Nov 25, 2009 at 6:51

3 votes

(Co-) Homology associated to Waldhausen K-Theory

answered Dec 19, 2009 at 3:53

3 votes

What are the fibrant objects in the injective model structure?

answered Dec 21, 2009 at 18:15

3 votes

Accepted

proving that an inclusion map from a subcomplex is a homotopy equivalence

answered Oct 19, 2009 at 17:54

3 votes

Accepted

Given a Spanning Tree and an Edge Not on the Spanning Tree, How to Form a Cycle Base?

answered Oct 22, 2009 at 17:50

3 votes

What is an example of a topological space that is not homotopy equivalent to a CW-complex?

answered Oct 18, 2009 at 22:29

3 votes

Derived functors vs universal delta functors

answered Oct 28, 2009 at 4:22

3 votes

What kind of geometric operations "scale up" cohomology?

answered Oct 29, 2009 at 5:22

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202 Answers

Simplicially enriched cartesian closed categories

What structure of a monoidal simplicial model category is preserved by taking the opposite category?

Coend computation continued

Does every cocontinuous functor between categories of presheaves on small categories have a right adjoint?

left quillen functor and fibrant objects

Connecting $2n$ points in $\mathbb R^2$ with line segments s.t. each point belongs to exactly one line segment

Sheaves on sites given by a (regular) cd-structure

What structure on a monoidal category would make its 2-category of module categories monoidal and braided?

What are the endofunctors on the simplex category?

triangulated vs. dg/A-infinity

What is the homology of the real coordinate ring of SO(n,R)? Other compact matrix groups?

Is there a topological description of combinatorial Euler characteristic?

Characterizing triangles unembeddedly

analog of principle of inclusion-exclusion

Can the objects of every concrete category themselves be realized as small categories?

What is the "right" definition of the free abelian group on a set?

Naturally definable sets of natural numbers

is localization of category of categories equivalent to |Cat|

Logical problems in category theory

Which Banach spaces have categorical duals?

Terminology: Is there a name for a category with biproducts?

Explicit description of a free braided monoidal groupoid with inverses

References/literature for pushouts in category of commutative monoids? [ed. - amalgams]

(Co-) Homology associated to Waldhausen K-Theory

What are the fibrant objects in the injective model structure?

proving that an inclusion map from a subcomplex is a homotopy equivalence

Given a Spanning Tree and an Edge Not on the Spanning Tree, How to Form a Cycle Base?

What is an example of a topological space that is not homotopy equivalent to a CW-complex?

Derived functors vs universal delta functors

What kind of geometric operations "scale up" cohomology?