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15
Math.TechQA.Club
2026-03-31 21:43:43
120
Views
Why "Lan" for Kan Extension?
Published on
31 Mar 2026 - 21:43
#category-theory
#notation
#kan-extensions
200
Views
Are Yoneda lifts (twice) of fully faithful functors fully faithful?
Published on
23 Feb 2026 - 6:41
#category-theory
#yoneda-lemma
#kan-extensions
138
Views
Functoriality of Kan extensions
Published on
01 Apr 2026 - 8:42
#reference-request
#category-theory
#kan-extensions
148
Views
How to complete semi-lattice via Adjunctions?
Published on
01 Apr 2026 - 15:10
#category-theory
#order-theory
#lattice-orders
#adjoint-functors
#kan-extensions
158
Views
How to understand the Grothendieck group as an adjoint?
Published on
09 Apr 2026 - 6:18
#category-theory
#monoid
#adjoint-functors
#grothendieck-construction
#kan-extensions
516
Views
When left Kan extension preserve colimits
Published on
23 Feb 2026 - 6:36
#category-theory
#yoneda-lemma
#kan-extensions
244
Views
Description of adjunctions in a 2-category via Kan extensions?
Published on
07 Apr 2026 - 1:14
#solution-verification
#category-theory
#adjoint-functors
#higher-category-theory
#kan-extensions
86
Views
Proper terminology of left and right Kan extensions as residuals?
Published on
23 Feb 2026 - 6:38
#category-theory
#kan-extensions
144
Views
Why $F : A \to B$ final is equivalent to $F_! : \hat{A} \to \hat{B} \dashv F^*$ preserving terminal objects?
Published on
23 Feb 2026 - 6:40
#category-theory
#limits-colimits
#kan-extensions
28
Views
Canonical morphism from $\operatorname{ran}_{(\operatorname{lan}_{f} 1_X)} 1_B$ to $f: X \to B$
Published on
23 Feb 2026 - 6:41
#category-theory
#kan-extensions
66
Views
Correct Definition of a Universal 2-Arrow In a 2-Category?
Published on
06 Apr 2026 - 12:12
#category-theory
#2-categories
#kan-extensions
246
Views
Left Kan Extension along identity?
Published on
01 Apr 2026 - 13:19
#category-theory
#limits-colimits
#kan-extensions
80
Views
Confused by definition of left Kan extension
Published on
23 Feb 2026 - 6:39
#category-theory
#kan-extensions
59
Views
Why can the Kan extension of F along K change even if we don't change the pointwise definition of F or G?
Published on
23 Feb 2026 - 6:41
#category-theory
#kan-extensions
227
Views
Does the Yoneda extension of a "representably flat" functor preserve finite limits?
Published on
23 Feb 2026 - 6:39
#category-theory
#topos-theory
#kan-extensions
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