Question

Carrying out a proof in an Abelian category without using an embedding theorem

score 58 · Answer 1 · 2026-05-11 01:59:54

58

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Carrying out a proof in an Abelian category without using an embedding theorem

Published on 11 May 2026 - 1:59

score 89 · Answer 2 · 2026-04-11 14:34:43

89

Views

Question about functoriality of free group.

Published on 11 Apr 2026 - 14:34

score 88 · Answer 3 · 2026-04-16 02:44:16

88

Views

Can there be no morphisms between two objects in a category?

Published on 16 Apr 2026 - 2:44

score 147 · Answer 4 · 2026-05-11 09:31:15

147

Views

Do all Functors have a natural transformation from the identity functor?

Published on 11 May 2026 - 9:31

score 60 · Answer 5 · 2026-04-12 10:41:42

60

Views

Where can I find information about topological products of larger 'support'?

Published on 12 Apr 2026 - 10:41

score 113 · Answer 6 · 2026-04-11 02:43:46

113

Views

References on history of topology and categorical aspects of topology.

Published on 11 Apr 2026 - 2:43

score 136 · Answer 7 · 2026-05-15 22:01:57

136

Views

A particular presheaf on a small category. What if it's representable?

Published on 15 May 2026 - 22:01

score 78 · Answer 8 · 2026-05-11 08:01:57

78

Views

Possibly easy diagram chase of the $3 \times 3$ lemma

Published on 11 May 2026 - 8:01

score 137 · Answer 9 · 2026-04-09 16:55:03

137

Views

Is a locally free sheaf of finite rank a projective object?

Published on 09 Apr 2026 - 16:55

score 243 · Answer 10 · 2026-04-13 08:21:05

243

Views

pushout in the category of topological space is closed under product with compact set

Published on 13 Apr 2026 - 8:21

score 64 · Answer 11 · 2026-04-13 10:17:34

64

Views

Partial arrow classifier as an (adjunction-related) universal arrow

Published on 13 Apr 2026 - 10:17

score 90 · Answer 12 · 2026-04-14 00:35:56

90

Views

Is there a projection functor $\mathbf{Set}/X^2 \to \mathbf{Set}/X$

Published on 14 Apr 2026 - 0:35

score 211 · Answer 13 · 2026-04-09 11:23:11

211

Views

Extending an adjunction using colimits

Published on 09 Apr 2026 - 11:23

score 76 · Answer 14 · 2026-05-15 22:30:46

76

Views

If the presheaf Hom$_\mathcal{C}(- \times A, B) : \mathcal{C}^\text{op} \to \textbf{Set}$ is representable, then $\mathcal{C}$ is ccc

Published on 15 May 2026 - 22:30

score 111 · Answer 15 · 2026-05-14 14:15:49

111

Views

Stackification of finite categories

Published on 14 May 2026 - 14:15

List Question

Carrying out a proof in an Abelian category without using an embedding theorem

Question about functoriality of free group.

Can there be no morphisms between two objects in a category?

Do all Functors have a natural transformation from the identity functor?

Where can I find information about topological products of larger 'support'?

References on history of topology and categorical aspects of topology.

A particular presheaf on a small category. What if it's representable?

Possibly easy diagram chase of the $3 \times 3$ lemma

Is a locally free sheaf of finite rank a projective object?

pushout in the category of topological space is closed under product with compact set

Partial arrow classifier as an (adjunction-related) universal arrow

Is there a projection functor $\mathbf{Set}/X^2 \to \mathbf{Set}/X$

Extending an adjunction using colimits

If the presheaf Hom$_\mathcal{C}(- \times A, B) : \mathcal{C}^\text{op} \to \textbf{Set}$ is representable, then $\mathcal{C}$ is ccc

Stackification of finite categories

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