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15
Math.TechQA.Club
2016-05-07 21:52:05
484
Views
Functor of points definition of a space modeled on a site
Published on
07 May 2016 - 21:52
#algebraic-geometry
#category-theory
#sheaf-theory
#topos-theory
61
Views
Are intersections of essential sublocales essential?
Published on
08 May 2016 - 1:46
#general-topology
#topos-theory
106
Views
When the empty family of arrows to an object is epimorphic, that object must be initial?
Published on
29 May 2016 - 23:32
#category-theory
#topos-theory
84
Views
"External" Lawvere-Tierney Topologies?
Published on
15 Jun 2016 - 23:48
#algebraic-geometry
#category-theory
#topos-theory
464
Views
Covering by open subfunctors and epimorphisms of sheaves.
Published on
18 Jun 2016 - 9:27
#algebraic-geometry
#category-theory
#sheaf-theory
#schemes
#topos-theory
263
Views
Two questions on completely regular filters in locales
Published on
23 Feb 2026 - 7:19
#general-topology
#lattice-orders
#filters
#topos-theory
#locales
308
Views
Different definitions of cartesian closed category?
Published on
27 Mar 2026 - 20:59
#category-theory
#topos-theory
1.3k
Views
Elementary topoi have initial objects, why?
Published on
02 Jul 2016 - 9:04
#category-theory
#topos-theory
584
Views
Glueing sheaves on Grothendieck sites
Published on
08 Apr 2013 - 14:46
#schemes
#sheaf-theory
#topos-theory
463
Views
Elephant: how do I prove Lemma 2.1.7, section C2.1?
Published on
11 Apr 2013 - 17:52
#category-theory
#sheaf-theory
#topos-theory
155
Views
Equivalence of groupoids induced by a G-torsor
Published on
18 Apr 2013 - 10:41
#category-theory
#topos-theory
1.8k
Views
A locally constant sheaf on a locally connected space is a covering space; Proof?
Published on
20 Apr 2013 - 23:17
#algebraic-topology
#category-theory
#covering-spaces
#topos-theory
250
Views
What functors preserve subobject classifiers?
Published on
24 Apr 2013 - 5:55
#category-theory
#topos-theory
727
Views
Plus construction of sheafification as a colimit of presheaves.
Published on
30 Apr 2013 - 10:15
#category-theory
#sheaf-theory
#topos-theory
539
Views
Two questions about monomorphisms and pullbacks in a Grothendieck topos
Published on
02 May 2013 - 16:11
#sheaf-theory
#topos-theory
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