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15
Math.TechQA.Club
2018-02-10 13:51:38
84
Views
Why is this monic equalizer an isomorphism?
Published on
10 Feb 2018 - 13:51
#category-theory
#proof-explanation
364
Views
Why is every sheaf of $\mathcal{O}_{X}$-modules not generated by global sections?
Published on
22 Mar 2026 - 23:13
#category-theory
#sheaf-theory
#quasicoherent-sheaves
99
Views
The choice of cofibrant approximation is contractible
Published on
22 Mar 2026 - 18:14
#category-theory
#simplicial-stuff
#model-categories
221
Views
Supremum of a family of subobjects in an abelian category
Published on
22 Mar 2026 - 23:09
#category-theory
#abelian-categories
#direct-sum
38
Views
the abstraction of equality
Published on
12 Feb 2018 - 18:16
#category-theory
273
Views
Permutation monad
Published on
25 Mar 2026 - 1:35
#category-theory
#monads
59
Views
elementary question category theory
Published on
12 Feb 2018 - 19:22
#category-theory
328
Views
Does the inverse image sheaf functor has a left adjoint?
Published on
23 Mar 2026 - 4:59
#category-theory
#sheaf-theory
#adjoint-functors
44
Views
Proving $Cov_B \simeq O(\pi_1(B,b))$ as categories.
Published on
25 Mar 2026 - 3:02
#algebraic-topology
#category-theory
#covering-spaces
64
Views
Lax/colax monoidal adjunction in terms of unit and counit
Published on
22 Mar 2026 - 14:09
#reference-request
#category-theory
#monoidal-categories
301
Views
Do Homotopy limits commute with right Quillen functors
Published on
22 Mar 2026 - 14:57
#algebraic-topology
#category-theory
#homotopy-theory
#simplicial-stuff
#model-categories
330
Views
Are module categories over a semisimple category semisimple?
Published on
13 Feb 2018 - 20:06
#category-theory
#modules
220
Views
Do proofs using the Yoneda lemma work for Categories that are not locally small?
Published on
17 Mar 2026 - 13:37
#category-theory
#yoneda-lemma
180
Views
Singletons (sets with single element): what's special about them?
Published on
25 Mar 2026 - 6:00
#elementary-set-theory
#soft-question
#category-theory
145
Views
Composition of monoid and category - which one is more generic?
Published on
25 Mar 2026 - 6:28
#category-theory
#definition
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