List questions from category-theory

Published on 01 Dec 2018 - 19:51

264

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Generators for category of abelian presheaves

Published on 26 Mar 2026 - 12:40

1.1k

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Definition of generator in an abelian category.

Published on 03 Dec 2018 - 4:52

181

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Are valued-quiver species and combinatorial species related?

Published on 24 Mar 2026 - 23:46

728

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$\overline{f}$ is isomorphism in abelian category

Published on 04 Dec 2018 - 10:45

220

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The category $\bf{FinVect}$ of finite vector spaces is rigid.

Published on 04 Dec 2018 - 11:27

106

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Can it be useful to think of functors as representing themselves ?

Published on 25 Mar 2026 - 6:21

394

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diagonal and codiagonal morphism in additive category

Published on 29 Mar 2026 - 5:50

228

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When is a functor uniquely determined by where it sends objects?

Published on 04 Dec 2018 - 22:22

68

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$[\mathsf{I},\mathsf{C}]$ and $[\mathsf{J},\mathsf{C}]$ are equivalent if $\mathsf{I}$ and $\mathsf{J}$ are.

Published on 25 Mar 2026 - 15:59

278

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Equivalences of skeletal categories are isomorphisms

Published on 05 Dec 2018 - 15:38

350

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Commuting right adjoints implies commuting left adjoints.

Published on 25 Mar 2026 - 4:54

348

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The subobject classifier is a set??

Published on 06 Dec 2018 - 2:09

150

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What is the theorem being mentioned here?

Published on 06 Dec 2018 - 2:47

289

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Which simplicial sets are filtered colimits of standard simplices?

Published on 25 Mar 2026 - 6:34

List Question

Pushout in the category of Sets: proof

Generators for category of abelian presheaves

Definition of generator in an abelian category.

Are valued-quiver species and combinatorial species related?

$\overline{f}$ is isomorphism in abelian category

The category $\bf{FinVect}$ of finite vector spaces is rigid.

Can it be useful to think of functors as representing themselves ?

diagonal and codiagonal morphism in additive category

When is a functor uniquely determined by where it sends objects?

$[\mathsf{I},\mathsf{C}]$ and $[\mathsf{J},\mathsf{C}]$ are equivalent if $\mathsf{I}$ and $\mathsf{J}$ are.

Equivalences of skeletal categories are isomorphisms

Commuting right adjoints implies commuting left adjoints.

The subobject classifier is a set??

What is the theorem being mentioned here?

Which simplicial sets are filtered colimits of standard simplices?

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