User Reid Barton

9 votes

Accepted

$(\infty,1)$-categories and model categories

answered Feb 23, 2010 at 23:08

9 votes

Accepted

Spectra and localizations of the category of topological spaces

answered Feb 24, 2010 at 4:25

8 votes

Homotopy type of set of self homotopy-equivalences of a surface

answered Mar 19, 2010 at 1:41

8 votes

Accepted

Ackermann-related function

answered Mar 29, 2010 at 17:26

8 votes

Uncountable preimage of every point

answered Nov 27, 2010 at 20:43

8 votes

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What is the definition of a $\mathcal{U}$-category?

answered Nov 1, 2018 at 20:44

8 votes

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Locally presentable categories, universes, and Vopenka's principle

answered Feb 24, 2019 at 21:39

8 votes

Is this geometrically-defined minimum an algebraic number?

answered Apr 15, 2021 at 18:16

8 votes

Accepted

Is there a free digraph associated to a graph?

answered Oct 21, 2009 at 18:35

8 votes

Reference for iterated homotopy fixed points?

answered Nov 12, 2009 at 4:39

8 votes

Asymptotics of a Bernoulli-number-like function

answered Jan 10, 2010 at 0:28

8 votes

Accepted

Does the product (by an object) in an abelian category ever have a right adjoint?

answered Dec 31, 2009 at 17:41

8 votes

How to compute the average distance till intersection within a triangle in $\mathbb{R}^2$?

answered Jan 2, 2010 at 5:52

7 votes

Yoneda embedding target

answered Jan 1, 2010 at 18:50

7 votes

Standard name of "atomic morphisms"?

answered Jan 4, 2010 at 15:19

7 votes

Accepted

Is every left fibration of simplicial sets with nonempty fibers a trivial kan fibration?

answered Dec 29, 2009 at 4:40

7 votes

Between abstract and concrete: What's the right way to think of specific categories?

answered Jan 22, 2010 at 15:45

7 votes

Is the coproduct of fibrant spectra fibrant again?

answered Nov 22, 2009 at 22:05

7 votes

Sum of $n$ vectors in $(\mathbb Z/n)^k$

answered Dec 5, 2009 at 18:31

7 votes

Is there a meaningful difference between biased and unbiased composition?

answered Dec 9, 2009 at 16:51

7 votes

(infinity,1)-categories directly from model categories

answered Dec 12, 2009 at 17:32

7 votes

Resources for learning practical category theory

answered Oct 17, 2009 at 18:25

7 votes

For which spaces is homology (or cohomology) determined by the Eilenberg-Steenrod axioms

answered Oct 29, 2009 at 17:09

7 votes

Cogroup objects

answered Nov 2, 2009 at 4:28

7 votes

Edge-disjoint shortest paths

answered Oct 31, 2009 at 22:10

7 votes

Accepted

Commutation of limits and colimits: Is there a choice diagram?

answered Feb 5, 2021 at 13:09

7 votes

Algebraic topology over fields other than ${\bf R}$

answered Nov 15, 2021 at 20:57

7 votes

Accepted

Equivalences in Model Categories

answered Mar 23, 2010 at 4:47

6 votes

The urge to combine 1- and 2-morphisms in slicing a 2-category.

answered Feb 26, 2010 at 23:03

6 votes

Kernels and cokernels of multicomplex homomorphisms

answered Nov 29, 2018 at 17:37

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202 Answers

$(\infty,1)$-categories and model categories

Spectra and localizations of the category of topological spaces

Homotopy type of set of self homotopy-equivalences of a surface

Ackermann-related function

Uncountable preimage of every point

What is the definition of a $\mathcal{U}$-category?

Locally presentable categories, universes, and Vopenka's principle

Is this geometrically-defined minimum an algebraic number?

Is there a free digraph associated to a graph?

Reference for iterated homotopy fixed points?

Asymptotics of a Bernoulli-number-like function

Does the product (by an object) in an abelian category ever have a right adjoint?

How to compute the average distance till intersection within a triangle in $\mathbb{R}^2$?

Yoneda embedding target

Standard name of "atomic morphisms"?

Is every left fibration of simplicial sets with nonempty fibers a trivial kan fibration?

Between abstract and concrete: What's the right way to think of specific categories?

Is the coproduct of fibrant spectra fibrant again?

Sum of $n$ vectors in $(\mathbb Z/n)^k$

Is there a meaningful difference between biased and unbiased composition?

(infinity,1)-categories directly from model categories

Resources for learning practical category theory

For which spaces is homology (or cohomology) determined by the Eilenberg-Steenrod axioms

Cogroup objects

Edge-disjoint shortest paths

Commutation of limits and colimits: Is there a choice diagram?

Algebraic topology over fields other than ${\bf R}$

Equivalences in Model Categories

The urge to combine 1- and 2-morphisms in slicing a 2-category.

Kernels and cokernels of multicomplex homomorphisms