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15
Math.TechQA.Club
2026-04-16 09:14:48
3.3k
Views
What exactly is an arrow in a category?
Published on
16 Apr 2026 - 9:14
#category-theory
#soft-question
#definition
#philosophy
74
Views
Definition: cofinal functor between triangulated categories
Published on
08 Apr 2026 - 14:31
#category-theory
#definition
#triangulated-categories
217
Views
Why can't the 3-type of $S^2$ be delooped?
Published on
25 Mar 2026 - 3:02
#algebraic-topology
#category-theory
#homotopy-theory
#groupoids
776
Views
Properties of injective modules
Published on
05 Apr 2026 - 22:41
#abstract-algebra
#category-theory
#homological-algebra
#injective-module
#algebraic-k-theory
159
Views
Proving that a diagram involving associators and unitors commutes in a 2-category
Published on
24 Apr 2026 - 19:08
#category-theory
#2-categories
126
Views
Is the product bifunctor uniquely determined by how it acts on objects?
Published on
13 Apr 2026 - 6:33
#category-theory
#functors
84
Views
Categories where possible automorphism groups are not understood.
Published on
29 Mar 2026 - 12:03
#group-theory
#category-theory
#automorphism-group
707
Views
Rerence Request - Companion Volume for Algebra Chapter 0 by Aluffi. Knapp or Grillet
Published on
15 Apr 2026 - 6:57
#abstract-algebra
#reference-request
#category-theory
#book-recommendation
199
Views
Empty projective limit of finite sets
Published on
26 Mar 2026 - 1:26
#category-theory
#order-theory
#limits-colimits
148
Views
Question on Inverse Limit Topology
Published on
16 Apr 2026 - 16:20
#general-topology
#ring-theory
#category-theory
90
Views
Existence of adjoint functors between topological categories
Published on
26 Mar 2026 - 4:52
#category-theory
#manifolds
#topological-groups
#adjoint-functors
66
Views
Function spaces on manifolds via category theory
Published on
13 Apr 2026 - 16:11
#analysis
#differential-geometry
#category-theory
73
Views
Verify that the contravariant powerset functor does indeed satisfy the criteria of a contravariant functor
Published on
14 Apr 2026 - 16:41
#category-theory
#solution-verification
144
Views
Pullback of 2 functors one of which creates limits and the other preserves
Published on
09 Apr 2026 - 15:05
#category-theory
#limits-colimits
#pullback
110
Views
Example additive functor which is neither right exact nor left exact.
Published on
16 Apr 2026 - 7:18
#category-theory
#homological-algebra
#abelian-groups
#abelian-categories
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