List questions from functors

Published on 09 Mar 2019 - 4:14

262

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Symmetric monoidal category which is not closed?

Published on 25 Mar 2026 - 9:50

183

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Is there a notion of a transversal of subobjects?

Published on 25 Mar 2026 - 6:06

146

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Do subobjects in concrete categories correspond to subsets?

Published on 17 Mar 2026 - 17:50

171

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Are diagrams of a quiver the same as small diagrams

Published on 24 Mar 2026 - 23:46

78

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Currying in a locally small category with coproducts

Published on 25 Mar 2026 - 7:44

225

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From monoids to commutative rings

Published on 25 Mar 2026 - 4:36

78

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What is the Krull dimension of the Burnside ring of $\mathbb N$?

Published on 25 Mar 2026 - 6:06

56

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Does every covariant functor on module category preserve inclusion?

Published on 26 Mar 2019 - 8:15

303

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EGA I (Springer), Proposition 0.4.5.4.

Published on 23 Feb 2026 - 6:19

257

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Not able to make sense of gluing via the functor of points in EGA

Published on 25 Mar 2026 - 6:22

1.6k

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Counterexample: functor does not preserve monomorphisms

Published on 25 Mar 2026 - 4:35

42

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How to see that $S(\sigma) = \text{Hom}_{\Delta}(\sigma, [0,1])$ maps to the category $\tilde{\Delta}^{\text{op}}$.

Published on 25 Mar 2026 - 0:02

107

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There's an equivalence of simplicial categories $\Delta \to \tilde{\Delta}^{\text{op}}$.

Published on 12 Apr 2019 - 2:54

83

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Proving naturality after determining a collection of isomorphisms.

Published on 25 Mar 2026 - 4:40

List Question

Does an adjoint of the Hom functor make a category monoidal?

Symmetric monoidal category which is not closed?

Is there a notion of a transversal of subobjects?

Do subobjects in concrete categories correspond to subsets?

Are diagrams of a quiver the same as small diagrams

Currying in a locally small category with coproducts

From monoids to commutative rings

What is the Krull dimension of the Burnside ring of $\mathbb N$?

Does every covariant functor on module category preserve inclusion?

EGA I (Springer), Proposition 0.4.5.4.

Not able to make sense of gluing via the functor of points in EGA

Counterexample: functor does not preserve monomorphisms

How to see that $S(\sigma) = \text{Hom}_{\Delta}(\sigma, [0,1])$ maps to the category $\tilde{\Delta}^{\text{op}}$.

There's an equivalence of simplicial categories $\Delta \to \tilde{\Delta}^{\text{op}}$.

Proving naturality after determining a collection of isomorphisms.

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