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15
Math.TechQA.Club
2026-04-13 05:40:24
106
Views
how is this a group when it is not closed under addition
Published on
13 Apr 2026 - 5:40
#category-theory
#sheaf-theory
99
Views
Mittag-Leffler Condition and fiber products
Published on
11 Apr 2026 - 17:10
#category-theory
#homological-algebra
#exact-sequence
#abelian-categories
#derived-functors
183
Views
Is there a name for this category associated to any functor between categories?
Published on
24 Apr 2026 - 22:08
#category-theory
#functors
709
Views
Categorical definition of Spectrum of a ring as a colimit?
Published on
15 Apr 2026 - 10:07
#algebraic-geometry
#category-theory
614
Views
Isomorphism of Hom sheaf
Published on
14 Apr 2026 - 16:26
#abstract-algebra
#algebraic-geometry
#category-theory
77
Views
Coequalizer is universal in $\textbf{Set}$
Published on
12 Apr 2026 - 20:19
#category-theory
#equivalence-relations
3.5k
Views
Why is the category of fields seemingly so poorly behaved?
Published on
16 Apr 2026 - 6:34
#abstract-algebra
#category-theory
#field-theory
57
Views
Universal morphism in the first isomorphism theorem for groups.
Published on
26 Mar 2026 - 4:29
#category-theory
#universal-property
80
Views
Flaw in a proof of uniqueness of products in a category?
Published on
14 Apr 2026 - 11:12
#category-theory
#solution-verification
61
Views
What name is given to this order relation on a monoid obtained by altering the definition of conjugate elements?
Published on
14 Apr 2026 - 12:28
#abstract-algebra
#category-theory
#terminology
#monoid
214
Views
Definition of comma category of a category.
Published on
24 Apr 2026 - 22:28
#category-theory
#schemes
#grothendieck-topologies
233
Views
Characterisation of exact sequence in abelian category
Published on
17 Apr 2026 - 10:10
#category-theory
#exact-sequence
#abelian-categories
181
Views
Base point of BU/BO, classifying space of U/O.
Published on
26 Mar 2026 - 6:29
#general-topology
#category-theory
#homotopy-theory
#limits-colimits
163
Views
Clarification on definition of a Sheaf
Published on
08 Apr 2026 - 10:54
#algebraic-geometry
#category-theory
#sheaf-theory
172
Views
Why is important to know if transformations between functors is natural or not?
Published on
25 Mar 2026 - 13:54
#category-theory
#natural-transformations
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