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15
341
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Does faithfully flat descent work using restriction of scalars rather than extension?

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#modules #descent #algebraic-stacks
100
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What are Mumford's 'moduli topologies'?

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#algebraic-geometry #reference-request #algebraic-stacks #grothendieck-topologies
501
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Showing that the moduli stack of triangles is equivalent to the quotient stack $[\tilde{T}/S_3]$

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#general-topology #geometry #category-theory #algebraic-stacks
1.2k
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The moduli space of stable maps

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#algebraic-geometry #category-theory #moduli-space #algebraic-stacks
1k
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Why the existence of automorphism of varieties makes a functor not being a fine moduli space?

Published on
#algebraic-geometry #moduli-space #algebraic-stacks
342
Views

Is my algebraic space a scheme?

Published on
#algebraic-geometry #algebraic-stacks
624
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How to describe the points of a quotient stack?

Published on
#algebraic-geometry #group-actions #algebraic-stacks
1.2k
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Sheaves of categories

Published on
#soft-question #category-theory #sheaf-theory #higher-category-theory #algebraic-stacks
517
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Is an étale morphism of algebraic stacks locally quasi-finite?

Published on
#algebraic-geometry #reference-request #definition #algebraic-stacks
349
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The non-existense of the fine moduli scheme of vector bundles. Why?

Published on
#algebraic-geometry #vector-bundles #schemes #moduli-space #algebraic-stacks
540
Views

Reference for Deligne-Mumford

Published on
#reference-request #algebraic-geometry #algebraic-stacks
162
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Homology of stack points

Published on
#algebraic-geometry #algebraic-topology #algebraic-stacks
97
Views

Open and Dense Substack

Published on
#algebraic-geometry #topos-theory #algebraic-stacks
76
Views

What are these canonical isomorphisms in 'Algebraic Spaces and Stacks' by Olsson?

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#algebraic-geometry #category-theory #algebraic-stacks
97
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Understanding a lemma about prestacks

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#category-theory #algebraic-stacks

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