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15
31
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What's the exactly the definition of the class in mathematics?

Published on
#category-theory #set-theory #terminology
96
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Free objects and representable functor

Published on
#category-theory
92
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The take lemma needs a coinductive proof

Published on
#category-theory #induction #proof-theory #coalgebras #theorem-provers
64
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Semantic doubt about enrichment of categories and what it means to have 'group structure'

Published on
#category-theory #additive-categories #enriched-category-theory
141
Views

Epimorphisms in the simplex category $\Delta$

Published on
#category-theory #simplicial-stuff
33
Views

In the tripos-to-topos construction, why should the underlying object of the terminal object be weakly terminal?

Published on
#category-theory #topos-theory
176
Views

What are important examples of essentially constant systems?

Published on
#algebraic-geometry #category-theory #examples-counterexamples #limits-colimits
140
Views

When does a multiplication table form a category?

Published on
#abstract-algebra #category-theory #algorithms #cayley-table
367
Views

Representability of a functor in the category of schemes

Published on
#algebraic-geometry #category-theory #schemes #representable-functor
482
Views

Jordan-Holder theorem for Abelian categories

Published on
#category-theory #abelian-categories
97
Views

Bar construction of the nerve of a category

Published on
#algebraic-topology #category-theory #homological-algebra
46
Views

Query about definition of filtered category

Published on
#category-theory #order-theory
145
Views

Abelianess of the category of projective modules

Published on
#abstract-algebra #category-theory #modules #projective-module
41
Views

Do morphisms need to make full use of their domain (category theory)?

Published on
#category-theory #morphism
118
Views

Functor from $BG \to \text{Gpd}$ induces functors for each $g \in G$.

Published on
#abstract-algebra #category-theory #functors #groupoids

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