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15
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When does Sheafification commute with direct image?

Published on
#algebraic-geometry #category-theory #sheaf-theory #topos-theory
799
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constant stalks but not constant sheaf?

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#general-topology #algebraic-geometry #homology-cohomology #sheaf-theory
58
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Injective resolution of abelian sheafs induces cochain complex on global sections.

Published on
#sheaf-theory #sheaf-cohomology
206
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About the presheaf used to define the inverse image sheaf.

Published on
#category-theory #sheaf-theory
337
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On the definition of locally free module sheaf

Published on
#sheaf-theory
1.5k
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Is the push-forward of a quasi-coherent sheaf under open immersion still quasi-coherent?

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#algebraic-geometry #sheaf-theory #schemes #quasicoherent-sheaves
88
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The higher cohomologies of a quasi-coherent sheaf on the intersection of two affine open subsets.

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#algebraic-geometry #homology-cohomology #sheaf-theory #quasicoherent-sheaves
355
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Product of affine varieties is the product of topological spaces

Published on
#algebraic-geometry #sheaf-theory #affine-geometry
1.1k
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Interpretation of sheaf flat over a base

Published on
#algebraic-geometry #commutative-algebra #sheaf-theory #schemes #flatness
243
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Acyclicity of Flasque sheaves without A.C.

Published on
#logic #axiom-of-choice #sheaf-theory #sheaf-cohomology
530
Views

must a surjective sheaf map be surjective on some open set?

Published on
#sheaf-theory
201
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Hartshorne notation in section III.12

Published on
#algebraic-geometry #sheaf-theory #schemes #sheaf-cohomology #coherent-sheaves
466
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Sheafification preserves injectivity.

Published on
#algebraic-geometry #sheaf-theory
593
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An isomorphism theorem for sheaves.

Published on
#algebraic-geometry #sheaf-theory
602
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Direct limit sheaf.

Published on
#algebraic-geometry #sheaf-theory

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