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15
54
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Is there a way of speaking about exact sequences in a category "nice enough" but without zero object?

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#category-theory #exact-sequence
75
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Galois types, factorization 2

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#category-theory #accessible-categories
67
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Question on a cone of an inverse system.

Published on
#abstract-algebra #category-theory #limits-colimits
349
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Understanding suspension in the model category of chain complexes.

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#algebraic-topology #category-theory #homological-algebra #homotopy-theory #model-categories
222
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Transpose of a diagram under an adjunction

Published on
#category-theory #topos-theory
78
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j-closed monomorphisms in a topos with a Lawvere-Tierney topology j

Published on
#category-theory #sheaf-theory #topos-theory
180
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Monoidal adjunction whose right-adjoint functor has structure morphisms which are epimorphisms

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#category-theory #tensor-products #natural-transformations #epimorphisms
254
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Contravariant Functor as covariant $F: C^{op} \rightarrow D$

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#category-theory
585
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What are they and what are some examples of abstract structures?

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#category-theory #terminology #definition
60
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Right adjoints preserve j-dense monos

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#category-theory #sheaf-theory #topos-theory
59
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A functor $\tilde{F}: \widehat{C} \to \widehat{D}$ is fully faithful iff $F: \mathcal{C} \to \mathcal{D}$ is fully faithful

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#category-theory
130
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A computation in a commutative Frobenius algebra

Published on
#category-theory #surfaces #hopf-algebras #topological-quantum-field-theory
66
Views

Adjointenes of unknown functors

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#category-theory #adjoint-functors #functors #accessible-categories
400
Views

Motivation for Filtered Categories/Limits?

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#category-theory
155
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What does this categorical construction do?

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#category-theory

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