Question

What is the topology associated with the algebras for the ultrafilter monad?

score 295 · Answer 1 · 2019-04-18 18:46:13

295

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What is the topology associated with the algebras for the ultrafilter monad?

Published on 18 Apr 2019 - 18:46

score 149 · Answer 2 · 2019-04-19 09:29:07

149

Views

composition rule in category theory

Published on 19 Apr 2019 - 9:29

score 624 · Answer 3 · 2026-03-25 06:08:55

624

Views

Semigroups with no morphisms between them

Published on 25 Mar 2026 - 6:08

score 282 · Answer 4 · 2026-03-25 08:09:04

282

Views

If $G : \mathcal{D} \to \mathcal{C}$ has a left adjoint then $G$ preserves kernels.

Published on 25 Mar 2026 - 8:09

score 1.1k · Answer 5 · 2026-03-25 22:11:20

1.1k

Views

A covariant functor sending every finite-dimensional vector space to its dual?

Published on 25 Mar 2026 - 22:11

score 192 · Answer 6 · 2026-03-26 17:32:36

192

Views

Pushout-product of anodyne extensions is again anodyne

Published on 26 Mar 2026 - 17:32

score 84 · Answer 7 · 2026-03-25 06:05:31

84

Views

$F(f)=0$, then $f=0$ where $0$ is the zero morphism for equivalent functors.

Published on 25 Mar 2026 - 6:05

score 117 · Answer 8 · 2026-03-30 22:56:09

117

Views

About comment by Jacobson on proving that a morphism in $\mathbf{Ring}$ is monic iff it is injective

Published on 30 Mar 2026 - 22:56

score 43 · Answer 9 · 2026-03-25 02:20:24

43

Views

Examples of codim-2 objects in extended TQFT

Published on 25 Mar 2026 - 2:20

score 249 · Answer 10 · 2026-02-23 03:01:41

249

Views

Epimorphisms preserved by pullback functor with right adjoint

Published on 23 Feb 2026 - 3:01

score 111 · Answer 11 · 2026-03-30 13:40:38

111

Views

Is category theory more a field of study or a viewpoint on mathematics?

Published on 30 Mar 2026 - 13:40

score 101 · Answer 12 · 2026-04-01 04:28:13

101

Views

Question on why a particular quasi-isomorphism between complexes doens't have an inverse

Published on 01 Apr 2026 - 4:28

score 116 · Answer 13 · 2026-03-25 23:10:12

116

Views

Comment about type theory in Lawvere and Rosebrugh's Sets for Mathematics

Published on 25 Mar 2026 - 23:10

score 82 · Answer 14 · 2026-04-01 04:27:46

82

Views

(Sup) property for an abelian category

Published on 01 Apr 2026 - 4:27

score 302 · Answer 15 · 2019-04-23 09:57:11

302

Views

Canonical ring structure on the tensor product $R \otimes_\mathbf{Z} S$.

Published on 23 Apr 2019 - 9:57

List Question

What is the topology associated with the algebras for the ultrafilter monad?

composition rule in category theory

Semigroups with no morphisms between them

If $G : \mathcal{D} \to \mathcal{C}$ has a left adjoint then $G$ preserves kernels.

A covariant functor sending every finite-dimensional vector space to its dual?

Pushout-product of anodyne extensions is again anodyne

$F(f)=0$, then $f=0$ where $0$ is the zero morphism for equivalent functors.

About comment by Jacobson on proving that a morphism in $\mathbf{Ring}$ is monic iff it is injective

Examples of codim-2 objects in extended TQFT

Epimorphisms preserved by pullback functor with right adjoint

Is category theory more a field of study or a viewpoint on mathematics?

Question on why a particular quasi-isomorphism between complexes doens't have an inverse

Comment about type theory in Lawvere and Rosebrugh's Sets for Mathematics

(Sup) property for an abelian category

Canonical ring structure on the tensor product $R \otimes_\mathbf{Z} S$.

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