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15
182
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A possible Grothendieck Topology/ Coverage of $\mathbf{Top}$?

Published on
#algebraic-geometry #algebraic-topology #category-theory #sheaf-theory #grothendieck-topologies
61
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The "Right" Concrete Category

Published on
#category-theory #functors
230
Views

Is the right adjoint to presheaf direct image interesting?

Published on
#category-theory #sheaf-theory
63
Views

Surjection on limits

Published on
#category-theory #limits-colimits
60
Views

Categorical product of compact objects is cancellative.

Published on
#category-theory
66
Views

Show that there can be at most one function $\phi : \mathcal{B} \rightarrow \mathcal{A}$ making a diagram commute.

Published on
#real-analysis #general-topology #category-theory #definition #compactness
125
Views

Questions about pushout in a suitable model category

Published on
#category-theory #limits-colimits #model-categories
50
Views

The importance of the condition $\mathcal{B}$ refines $\mathcal{A}$ in finding a function $\phi$ making the diagram commutes.

Published on
#real-analysis #general-topology #analysis #category-theory #definition
216
Views

What's the final coalgebra of $F(S) = 1 + N \times S$ and initial algebra of $F(S) = N \times S$

Published on
#category-theory #type-theory
129
Views

The colimit is contractible.

Published on
#general-topology #category-theory
59
Views

Geometric morphisms and presheaves

Published on
#category-theory #topos-theory #adjoint-functors
163
Views

Category of real numbers whose categorical sums/products are regular sums/products

Published on
#category-theory #real-numbers
113
Views

Example of a finite category without (co)limits?

Published on
#abstract-algebra #category-theory
68
Views

A question about homotopy pushout

Published on
#category-theory #limits-colimits #model-categories #diagram-chasing
67
Views

a strong factorization system on $\mathbf{Set}$

Published on
#category-theory

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