List questions from category-theory

Published on 29 Mar 2026 - 6:29

62

Views

Classifying natural transformations $H^n (-;G) \rightarrow H^k(-;G)$

Published on 24 Jan 2019 - 13:24

130

Views

Adjunction Signature: abuse of notation or actual functor?

Published on 25 Mar 2026 - 6:28

860

Views

Coproduct of abelian categories

Published on 25 Jan 2019 - 22:35

213

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Kernel of $G\ast H\to G\times H$ is free

Published on 25 Mar 2026 - 14:25

231

Views

In what sense are Minkowski spaces with $(1,3)$ and $(3,1)$ signature isomorphic?

Published on 25 Mar 2026 - 6:06

464

Views

Well-Pointed categories vs well-pointed topoi

Published on 27 Mar 2026 - 22:03

194

Views

Can we see categories as programming languages?

Published on 25 Mar 2026 - 20:33

71

Views

Grothendieck fibrations via right lifting property

Published on 27 Jan 2019 - 12:24

184

Views

Every subset $U \subset A$ is an equalizer

Published on 27 Jan 2019 - 23:01

206

Views

Fibered Categories in Groupoids

Published on 24 Mar 2026 - 21:59

125

Views

are two different pairs of objects allowed to share the same morphism in a category?

Published on 28 Jan 2019 - 7:13

197

Views

About proving a cokernel is not representable

Published on 27 Mar 2026 - 10:24

118

Views

Categories Fibered in Groupoids and Yoneda

Published on 22 Mar 2026 - 12:16

234

Views

Is it meaningful to distinguish a one-object category and its opposite?

Published on 28 Jan 2019 - 20:01

List Question

Is the functor $\text{Spec}:(\mathsf{CRing})^{\text{op}}\to\mathsf{Set}$ right exact?

Classifying natural transformations $H^n (-;G) \rightarrow H^k(-;G)$

Adjunction Signature: abuse of notation or actual functor?

Coproduct of abelian categories

Kernel of $G\ast H\to G\times H$ is free

In what sense are Minkowski spaces with $(1,3)$ and $(3,1)$ signature isomorphic?

Well-Pointed categories vs well-pointed topoi

Can we see categories as programming languages?

Grothendieck fibrations via right lifting property

Every subset $U \subset A$ is an equalizer

Fibered Categories in Groupoids

are two different pairs of objects allowed to share the same morphism in a category?

About proving a cokernel is not representable

Categories Fibered in Groupoids and Yoneda

Is it meaningful to distinguish a one-object category and its opposite?

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