List questions from schemes

Published on 10 Sep 2011 - 15:02

163

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Confusion with closed subsets of variety

Published on 11 Sep 2011 - 17:58

422

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Geometry of abelian varieties

Published on 25 Mar 2026 - 23:10

453

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Ample divisor on abelian variety

Published on 25 Mar 2026 - 23:16

6k

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Why does the definition of an open subscheme / open immersion of schemes allow for an "extra" isomorphism?

Published on 06 Oct 2011 - 6:37

109

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Is there a $\mathbb{C}_g$, where $g$ is composite?

Published on 10 Oct 2011 - 9:30

157

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Segre classes of singular projective varieties

Published on 12 Oct 2011 - 1:47

840

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First Ext group of a sheaf

Published on 26 Mar 2026 - 8:14

626

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What does "Biextension of Abelian Varieties" mean?

Published on 25 Mar 2026 - 23:08

201

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Morphisms of abelian variety and torus in additive group

Published on 25 Mar 2026 - 23:16

160

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Isomorphism of first infinitesimal neighborhoods

Published on 25 Mar 2026 - 23:10

557

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Dual Numbers and Infinitesimal Neighborhood

Published on 22 Oct 2011 - 14:49

131

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Elementary Question about Adjunction Isomorphism

Published on 24 Oct 2011 - 11:23

1k

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Tangent space in a point and First Ext group

Published on 25 Mar 2026 - 23:16

666

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Definition of Grothendieck Connection

Published on 08 Apr 2026 - 16:17

List Question

Closed points on varieties

Confusion with closed subsets of variety

Geometry of abelian varieties

Ample divisor on abelian variety

Why does the definition of an open subscheme / open immersion of schemes allow for an "extra" isomorphism?

Is there a $\mathbb{C}_g$, where $g$ is composite?

Segre classes of singular projective varieties

First Ext group of a sheaf

What does "Biextension of Abelian Varieties" mean?

Morphisms of abelian variety and torus in additive group

Isomorphism of first infinitesimal neighborhoods

Dual Numbers and Infinitesimal Neighborhood

Elementary Question about Adjunction Isomorphism

Tangent space in a point and First Ext group

Definition of Grothendieck Connection

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