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What does the Grothendieck's period conjecture mean?

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#algebraic-geometry #schemes #open-problem #sheaf-cohomology
140
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A basic question on local cohomology

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#algebraic-geometry #sheaf-theory #sheaf-cohomology #local-cohomology
134
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On the (Pre-)History of Sheaf Theory

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#terminology #math-history #sheaf-theory #philosophy #sheaf-cohomology
52
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Equality $H^i(K,\mathcal{F}_{|K})=\varinjlim_{U\supset K}H^i(U,\mathcal{F}_{|U})$ for a constructible sheaf

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#algebraic-geometry #algebraic-topology #homology-cohomology #complex-geometry #sheaf-cohomology
188
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Behaviour of Chern class under deformation

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#algebraic-geometry #algebraic-topology #vector-bundles #sheaf-cohomology #deformation-theory
308
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Geometric intuition for left/right exactness

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#intuition #sheaf-theory #exact-sequence #sheaf-cohomology #big-picture
167
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Direct Summand and Intersection Homology

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#algebraic-geometry #algebraic-topology #homology-cohomology #sheaf-cohomology
363
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Difference between direct image and exceptionnal direct image of a local system

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#sheaf-theory #sheaf-cohomology
124
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Gerbes and Brauer group

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#algebraic-geometry #category-theory #topos-theory #sheaf-cohomology #higher-category-theory
230
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An informal account of Godement resolution??

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#algebraic-topology #terminology #sheaf-theory #sheaf-cohomology
700
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Skyscraper sheaf?

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#sheaf-theory #visualization #sheaf-cohomology
1.3k
Views

Possible error in Hartshorne exercise III.2.7

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#sheaf-theory #sheaf-cohomology
560
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An image suitable for a skyscraper sheaf?

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#sheaf-theory #visualization #sheaf-cohomology
43
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Does action on $X$ define an action on cohomology $H^i(X,F)$?

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#homology-cohomology #sheaf-theory #sheaf-cohomology
1.2k
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etale vs zariski cohomology for coherent sheaves

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#algebraic-geometry #sheaf-cohomology #etale-cohomology

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