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15
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Let $i : U \to X$ be an open inclusion. Is $ i_* i^{-1} $ an exact functor?

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#sheaf-theory #sheaf-cohomology
15
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For every abelian sheaf, $F(\phi)=\{ 0 \}$?

Published on
#sheaf-theory
319
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Sheafification and monomorphisms.

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#category-theory #sheaf-theory
210
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Construction of relative projective space via glueing

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#algebraic-geometry #sheaf-theory #schemes #projective-space #projective-schemes
1.8k
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When can stalks be glued to recover a sheaf?

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#algebraic-geometry #category-theory #sheaf-theory #schemes
1.2k
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Sheaves of categories

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#soft-question #category-theory #sheaf-theory #higher-category-theory #algebraic-stacks
829
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Extending sections of quasi-coherent sheaves on locally Noetherian normal schemes across codimension 2 sets?

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#algebraic-geometry #proof-verification #commutative-algebra #sheaf-theory
857
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Injective ring homomorphism induces injective morphism on sheaves

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#algebraic-geometry #commutative-algebra #sheaf-theory #localization
89
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Global section functor on cosheaves

Published on
#homology-cohomology #sheaf-theory #derived-functors
222
Views

Global Section Functor Existence for Pre(Co)Sheaves?

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#homology-cohomology #sheaf-theory #sheaf-cohomology #derived-functors
208
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Gluing together functions on a closed subvariety

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#algebraic-geometry #sheaf-theory
104
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Global Section Functor exactness for Precosheaves

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#homology-cohomology #sheaf-theory #sheaf-cohomology #derived-functors
7.5k
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Vector bundle as locally free coherent sheaves

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#algebraic-geometry #sheaf-theory #complex-geometry #vector-bundles #coherent-sheaves
330
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Cosheaf homology Global Sections

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#sheaf-theory #sheaf-cohomology
853
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Relation between stalks of twisted sheaf and structure sheaf

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#algebraic-geometry #commutative-algebra #sheaf-theory #graded-rings #projective-schemes

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