List questions from category-theory

Published on 14 Apr 2026 - 22:57

55

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$\omega$-pure subgraph in $\mathbf{Grph}$

Published on 10 Apr 2026 - 4:36

45

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Name of non-full sub-category whose morphisms are equivalent to morphisms of category "up to automorphisms"?

Published on 17 Apr 2026 - 13:34

92

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Pullback of cartesian fibration preserves cartesian morphisms?

Published on 25 Mar 2026 - 12:31

94

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Direct image in a topos

Published on 15 Apr 2026 - 5:41

1.5k

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What are the prerequisites for topos theory?

Published on 10 Apr 2026 - 21:15

96

Views

some clearly fact about δ-functor in an abelian category

Published on 16 Apr 2026 - 11:47

57

Views

Derived category of stack of vector bundles on (punctured) affine plane

Published on 22 Apr 2026 - 13:46

159

Views

Natural transformation between $\mathcal{F}$ and $\mathcal{G}$

Published on 25 Mar 2026 - 12:15

93

Views

$D$ is triangulated. Then opposite functor $op:D\to D^{op}$ 's image is triangulated?

Published on 12 Mar 2020 - 22:10

101

Views

Functor maps a morphism to empty morphism

Published on 16 Apr 2026 - 0:49

80

Views

Existence of certain factorization of simplicial map

Published on 27 Mar 2026 - 13:02

70

Views

How many natural transformations in the end $\int_{c\in C}Hom(c,c)$?

Published on 17 Apr 2026 - 15:02

467

Views

Does the forgetful functor $U: \mathbf{Gph} \to \mathbf{Set}$ have a left adjoint?

Published on 25 Mar 2026 - 4:38

178

Views

Gluing morphisms of sheaves on the big zariski site

Published on 25 Mar 2026 - 14:26

List Question

generators and monoid homomorphisms

$\omega$-pure subgraph in $\mathbf{Grph}$

Name of non-full sub-category whose morphisms are equivalent to morphisms of category "up to automorphisms"?

Pullback of cartesian fibration preserves cartesian morphisms?

Direct image in a topos

What are the prerequisites for topos theory?

some clearly fact about δ-functor in an abelian category

Derived category of stack of vector bundles on (punctured) affine plane

Natural transformation between $\mathcal{F}$ and $\mathcal{G}$

$D$ is triangulated. Then opposite functor $op:D\to D^{op}$ 's image is triangulated?

Functor maps a morphism to empty morphism

Existence of certain factorization of simplicial map

How many natural transformations in the end $\int_{c\in C}Hom(c,c)$?

Does the forgetful functor $U: \mathbf{Gph} \to \mathbf{Set}$ have a left adjoint?

Gluing morphisms of sheaves on the big zariski site

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