User Philippe Gaucher

28 votes

Small ideas that became big

answered Aug 15, 2020 at 6:53

21 votes

Most striking applications of category theory?

answered Jul 28, 2012 at 9:05

20 votes

Accepted

Negative objects in categories

answered Jun 20, 2012 at 17:53

8 votes

What was Burroni's sketch for topological spaces?

answered Jul 27, 2017 at 0:36

7 votes

Nonequivalent definitions in Mathematics

answered Nov 23, 2017 at 9:40

7 votes

Why should have Peter May worked with CGWH instead of CGH in "The Geometry of Iterated Loop Space"?

answered May 4, 2015 at 8:48

6 votes

What's an example of a locally presentable category "in nature" that's not $\aleph_0$-locally presentable?

answered Jun 9, 2017 at 17:21

5 votes

Accepted

Left determined model structure on delta-generated topological spaces

answered Jun 28, 2012 at 7:06

4 votes

Intuitionistic algebraic topology?

answered Nov 5, 2013 at 19:35

4 votes

Which mathematical definitions should be formalised in Lean?

answered Sep 26, 2018 at 6:19

3 votes

example of "really" non-existent transferred model structure

answered Dec 4, 2021 at 9:13

3 votes

Accepted

Does the category of posets have pushouts and pullbacks?

answered Dec 2, 2014 at 14:36

3 votes

Cofibrant replacements of a given object in a combinatorial model category

answered May 10, 2013 at 10:08

3 votes

Categorical Construction of Quotient Topology?

answered Oct 13, 2013 at 15:05

3 votes

Accepted

About small $\omega$-orthogonality classes and Gabriel-Ulmer duality

answered Jul 25, 2017 at 6:58

3 votes

What's a good introduction to category theory for someone doing analysis?

answered Aug 17, 2015 at 7:45

3 votes

Free open-access peer-reviewed math journals

answered Mar 15, 2018 at 6:32

2 votes

Accepted

Transporting a model category structure along a left adjoint

answered May 17, 2018 at 10:56

2 votes

Cogenerator of Categories of Topological Spaces Satisfying Some Separation Axiom

answered May 24, 2018 at 3:33

2 votes

What's special about the Simplex category?

answered Jun 16, 2014 at 10:01

1 vote

Higher dimensional pasting diagram of cubes

answered Nov 28, 2013 at 10:31

1 vote

On the foundations for large categories

answered Feb 21, 2014 at 9:11

1 vote

Accepted

How to describe this set of maps of posets?

answered Sep 7, 2022 at 7:38

1 vote

On model categories where every object is bifibrant

answered Apr 2, 2019 at 8:52

0 votes

Accepted

Removing the symmetry maps from a small category of cubes

answered May 19, 2023 at 15:30

0 votes

Which sequential colimits commute with pullbacks in the category of topological spaces?

answered Aug 28, 2015 at 14:37

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26 Answers

Small ideas that became big

Most striking applications of category theory?

Negative objects in categories

What was Burroni's sketch for topological spaces?

Nonequivalent definitions in Mathematics

Why should have Peter May worked with CGWH instead of CGH in "The Geometry of Iterated Loop Space"?

What's an example of a locally presentable category "in nature" that's not $\aleph_0$-locally presentable?

Left determined model structure on delta-generated topological spaces

Intuitionistic algebraic topology?

Which mathematical definitions should be formalised in Lean?

example of "really" non-existent transferred model structure

Does the category of posets have pushouts and pullbacks?

Cofibrant replacements of a given object in a combinatorial model category

Categorical Construction of Quotient Topology?

About small $\omega$-orthogonality classes and Gabriel-Ulmer duality

What's a good introduction to category theory for someone doing analysis?

Free open-access peer-reviewed math journals

Transporting a model category structure along a left adjoint

Cogenerator of Categories of Topological Spaces Satisfying Some Separation Axiom

What's special about the Simplex category?

Higher dimensional pasting diagram of cubes

On the foundations for large categories

How to describe this set of maps of posets?

On model categories where every object is bifibrant

Removing the symmetry maps from a small category of cubes

Which sequential colimits commute with pullbacks in the category of topological spaces?