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15
Math.TechQA.Club
2026-04-16 07:14:57
73
Views
small-cone-injectivity in $\mathbf{Grp}$
Published on
16 Apr 2026 - 7:14
#category-theory
#terminology
100
Views
Multisets don't have addition
Published on
14 May 2026 - 10:58
#category-theory
#monads
115
Views
Universal property for normal subgroup and deeper intuition
Published on
15 Apr 2026 - 15:21
#group-theory
#category-theory
#normal-subgroups
102
Views
Why only the usual limits and colimits?
Published on
11 Apr 2026 - 9:18
#logic
#category-theory
125
Views
On the definition of sheaf on a site "without matching families"
Published on
15 Apr 2026 - 23:07
#category-theory
#sheaf-theory
127
Views
Why is Lie’s first theorem not global?
Published on
13 Apr 2026 - 8:22
#differential-geometry
#category-theory
#manifolds
#lie-groups
#lie-algebras
114
Views
How to prove $Spec A_1\times Spec A_2=Spec ( A_1\otimes A_2)$ by a direct way?
Published on
09 Apr 2026 - 13:44
#algebraic-geometry
#commutative-algebra
#category-theory
#fibre-product
52
Views
What are colored morphisms/arrows intended to mean in these diagrams?
Published on
11 May 2026 - 5:04
#category-theory
#universal-property
#morphism
#natural-transformations
#diagram-chasing
106
Views
Pushout of groups where one is the trivial group
Published on
14 Apr 2026 - 15:34
#group-theory
#category-theory
111
Views
Cartesian Category Definition
Published on
13 Apr 2026 - 2:30
#category-theory
96
Views
Context on the theory of category theory
Published on
13 Apr 2026 - 10:54
#logic
#category-theory
#propositional-calculus
91
Views
There exists a definition of order homomorphism?
Published on
14 Apr 2026 - 1:19
#elementary-set-theory
#category-theory
#definition
#examples-counterexamples
#order-theory
47
Views
Terminology: (Co)equalizer of a family of morphisms?
Published on
11 May 2026 - 8:38
#abstract-algebra
#category-theory
#terminology
#limits-colimits
#morphism
327
Views
Counterexample in topos theory
Published on
09 Apr 2026 - 17:57
#category-theory
#examples-counterexamples
#topos-theory
45
Views
Basic Combinatorics Question from Article 1 of Lawvere's Conceptual Mathematics
Published on
13 Apr 2026 - 11:43
#combinatorics
#elementary-set-theory
#category-theory
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