List questions from schemes

Published on 26 Mar 2026 - 21:29

201

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Tangent vector fields on schemes

Published on 21 Aug 2019 - 17:57

70

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Lifts Preserve Smoothness (especially Flatness)

Published on 25 Mar 2026 - 6:10

358

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Annihilator of a coherent sheaf, on affine subsets.

Published on 25 Mar 2026 - 14:33

55

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Question on Sections of Algebraic Curve

Published on 28 Mar 2026 - 4:34

40

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Is the sequence of $\mathcal O_Y$-modules $0\to f_\mathcal I\to f_\mathcal O_X\to f_*(\mathcal O_X/\mathcal I)\to 0$ exact?

Published on 27 Mar 2026 - 15:20

92

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Question on Sections of Hyperelliptic Curve

Published on 24 Aug 2019 - 18:10

572

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Quasifinite morphisms to a field are finite (Vakil)

Published on 25 Aug 2019 - 23:21

265

Views

bijection between tangent vectors and morphisms

Published on 26 Aug 2019 - 16:27

35

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Points on a scheme with given norm (or finding the maximal ideals of $\mathbb F_p[T_1, \dots, T_n]$)

Published on 26 Aug 2019 - 23:17

107

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Restriction and extension of scalars for cohomology groups on a projective scheme

Published on 25 Mar 2026 - 11:14

91

Views

When the contravariant Hom functor of two finite type integral $k$-schemes are isomorphic on points

Published on 23 Feb 2026 - 3:31

47

Views

Reference requence: scheme of complete homomorphisms of rank $r$ via blowups.

Published on 25 Mar 2026 - 12:29

44

Views

Support of a section behaves well with quotients

Published on 27 Mar 2026 - 22:05

477

Views

Sheaf of nilpotent elements

Published on 25 Mar 2026 - 17:29

List Question

Global sections of a line bundle

Tangent vector fields on schemes

Lifts Preserve Smoothness (especially Flatness)

Annihilator of a coherent sheaf, on affine subsets.

Question on Sections of Algebraic Curve

Is the sequence of $\mathcal O_Y$-modules $0\to f_\mathcal I\to f_\mathcal O_X\to f_*(\mathcal O_X/\mathcal I)\to 0$ exact?

Question on Sections of Hyperelliptic Curve

Quasifinite morphisms to a field are finite (Vakil)

bijection between tangent vectors and morphisms

Points on a scheme with given norm (or finding the maximal ideals of $\mathbb F_p[T_1, \dots, T_n]$)

Restriction and extension of scalars for cohomology groups on a projective scheme

When the contravariant Hom functor of two finite type integral $k$-schemes are isomorphic on points

Reference requence: scheme of complete homomorphisms of rank $r$ via blowups.

Support of a section behaves well with quotients

Sheaf of nilpotent elements

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