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15
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For which (concrete) categories does the following hold: the subcatgeory whose objects are finite has a set-wise of objects?

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#category-theory #set-theory
325
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Confusion about definition of adjoint functors via triangle identities

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#category-theory #adjoint-functors
103
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How to understand the Yoneda lemma

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#category-theory
103
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Subobject classifier of disjoint sum of subobjects

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#category-theory #topos-theory
45
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What are common ways of "building" objects from "smaller" objects?

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#reference-request #category-theory #examples-counterexamples
339
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For which categories is its Yoneda embedding essentially surjective?

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#category-theory #examples-counterexamples #yoneda-lemma #representable-functor
182
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Is iteratively applying the Yoneda embedding interesting?

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#category-theory #yoneda-lemma
89
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Can every category be regarded as the functor category of another?

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#category-theory #yoneda-lemma
563
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Module as a functor

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#abstract-algebra #ring-theory #category-theory #modules #functors
93
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Algebras of monad of polynomials over commutative rings

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#commutative-algebra #category-theory #solution-verification #monads
183
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Quotient of a pre-order category

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#logic #category-theory #order-theory #equivalence-relations
152
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Categorification of $Vec_G$

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#group-theory #category-theory #monoidal-categories #fusion-categories
236
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Proving that two formulations of the Homotopy Extension Property via diagrams, are equivalent.

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#algebraic-topology #category-theory #homotopy-theory #cofibrations #homotopy-extension-property
179
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How Topos "connect" continuous and discrete

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#algebraic-topology #category-theory #philosophy #topos-theory
175
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An Example of a non-Kan extension

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#category-theory

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