List questions from algebraic-geometry

Published on 25 Mar 2026 - 4:38

226

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Trying to understand Levi decomposition of a parabolic subgroup.

Published on 25 Mar 2026 - 3:07

1.5k

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If there exists an irreducible open covering, then the space is irreducible.

Published on 25 Mar 2026 - 7:44

232

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If a line intersects a curve in $n-1$ rational points is the $n$'th point also rational?

Published on 25 Mar 2026 - 1:17

75

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$Sp_{2g}(\Bbb Z) \rightarrow Sp_{2g}(\Bbb Z/m) $ is surjective?

Published on 24 Apr 2018 - 12:19

569

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Rank function for a projective module is locally constant

Published on 30 Mar 2026 - 3:17

363

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Surjectivity is a local property?

Published on 30 Mar 2026 - 3:17

37

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If a variety has a $Q$ model, does its blowing up also have $Q$ model?

Published on 24 Mar 2026 - 22:01

72

Views

solving $ f(x,y,z) = \beta_{111} x y z$

Published on 25 Mar 2026 - 22:10

350

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Unramified extension of Dedekind domains implies etale covering

Published on 28 Mar 2026 - 11:27

574

Views

What are applications of etale cohomology and Abelian varieties? (And what is arithmetic geometry?)

Published on 22 Mar 2026 - 12:34

138

Views

Restriction of Invertible Sheaf to Curve

Published on 25 Mar 2026 - 9:39

95

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Finite Polynomial Maps Between Affine Varieties

Published on 25 Mar 2026 - 9:31

95

Views

Finite polynomial maps

Published on 30 Mar 2026 - 3:24

1k

Views

Is there an elementary proof of Cayley-Bacharach that holds in the case where points are not necessarily distinct?

Published on 25 Mar 2026 - 19:10

List Question

Why is the opposite Borel subgroup used?

Trying to understand Levi decomposition of a parabolic subgroup.

If there exists an irreducible open covering, then the space is irreducible.

If a line intersects a curve in $n-1$ rational points is the $n$'th point also rational?

$Sp_{2g}(\Bbb Z) \rightarrow Sp_{2g}(\Bbb Z/m) $ is surjective?

Rank function for a projective module is locally constant

Surjectivity is a local property?

If a variety has a $Q$ model, does its blowing up also have $Q$ model?

solving $ f(x,y,z) = \beta_{111} x y z$

Unramified extension of Dedekind domains implies etale covering

What are applications of etale cohomology and Abelian varieties? (And what is arithmetic geometry?)

Restriction of Invertible Sheaf to Curve

Finite Polynomial Maps Between Affine Varieties

Finite polynomial maps

Is there an elementary proof of Cayley-Bacharach that holds in the case where points are not necessarily distinct?

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