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15
Math.TechQA.Club
2026-04-29 12:44:01
52
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Minimal site that induces a stack from a psuedofunctor
Published on
29 Apr 2026 - 12:44
#category-theory
#grothendieck-topologies
#grothendieck-construction
#topological-stacks
227
Views
Coincidence of classical notion of covering in classical topology and covering sieve in grothendieck topology
Published on
29 Apr 2026 - 12:19
#general-topology
#category-theory
#topos-theory
#grothendieck-topologies
99
Views
Locality in Grothendieck Topologies
Published on
29 Apr 2026 - 12:19
#algebraic-geometry
#topos-theory
#grothendieck-topologies
307
Views
"Coverings" and "covers" in Grothendieck topologies
Published on
29 Apr 2026 - 12:46
#general-topology
#category-theory
#grothendieck-topologies
64
Views
Grothendieck sites based on large categories?
Published on
29 Apr 2026 - 12:46
#category-theory
#set-theory
#grothendieck-topologies
232
Views
The étale topos is coherent: does the scheme need to be quasicompact?
Published on
29 Apr 2026 - 12:46
#compactness
#schemes
#topos-theory
#etale-cohomology
#grothendieck-topologies
59
Views
Is it known that the etale topology on schemes does not have cd structure?
Published on
29 Apr 2026 - 12:45
#reference-request
#grothendieck-topologies
173
Views
Map from schemes to stacks
Published on
29 Apr 2026 - 12:46
#algebraic-geometry
#principal-bundles
#grothendieck-topologies
#algebraic-stacks
168
Views
What changes in the sheaf theory of topological spaces with the "étale topology"?
Published on
29 Apr 2026 - 12:46
#general-topology
#sheaf-theory
#grothendieck-topologies
222
Views
Grothendieck Universe
Published on
29 Apr 2026 - 12:45
#category-theory
#definition
#grothendieck-topologies
286
Views
Set theoretic issues in the definition of a site in Stacks Project
Published on
29 Apr 2026 - 12:46
#algebraic-geometry
#category-theory
#set-theory
#sheaf-theory
#grothendieck-topologies
204
Views
Sheaf Axiom for Presheaves on Sites
Published on
10 May 2026 - 14:57
#algebraic-geometry
#sheaf-theory
#grothendieck-topologies
179
Views
(Pre)sheaf epimorphism admits a section?
Published on
10 May 2026 - 15:58
#category-theory
#sheaf-theory
#grothendieck-topologies
187
Views
Is there a fiber bundle/espace-etale interpretation of sheaves on a Grothendieck site
Published on
10 May 2026 - 17:17
#algebraic-geometry
#category-theory
#sheaf-theory
#etale-cohomology
#grothendieck-topologies
1.5k
Views
Kummer sequence etale topology
Published on
10 May 2026 - 14:53
#algebraic-geometry
#etale-cohomology
#grothendieck-topologies
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