List questions from algebraic-geometry

Published on 12 Apr 2026 - 7:18

244

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Blow-up along empty subvariety?

Published on 11 Feb 2019 - 17:39

49

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Is it true "If $X \subset Y$ then $\Bbb I(Y) \subset \Bbb I(X)$"(proper inclusion)?

Published on 30 Mar 2026 - 11:37

82

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Prove that $\mathcal {I} (H) = (F_1 \cdot F_2 \cdots F_s).$

Published on 25 Mar 2026 - 9:39

178

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Hartshorne Exercise 1.1.1(c)

Published on 07 Apr 2026 - 3:34

539

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Geometric Intuition behind Flatness

Published on 11 Apr 2026 - 5:36

65

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The valuation attached to a smooth point of an algebraic variety

Published on 25 Mar 2026 - 1:18

149

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Is one sheafification enough for the module inverse image?

Published on 26 Mar 2026 - 17:43

1.4k

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What is a rational section of an invertible sheaf?

Published on 12 Apr 2026 - 17:55

72

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Show that there exist $a,b \in K [X_1,X_2,\cdots,X_n]$ and $d \in K[X_1,X_2,\cdots,X_{n-1}]$ such that $aF+bG = d.$

Published on 09 Apr 2026 - 5:53

232

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Explicit example of complete discrete valuation field with prescribed residue field

Published on 11 Apr 2026 - 20:29

41

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Polynomial Ring modulo Ideal is Polynomial ring of cosets of indeterminates.

Published on 30 Mar 2026 - 11:38

554

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Factor Theorem for Multivariate Polynomials

Published on 13 Apr 2026 - 0:24

149

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Does the covering involution lift to the pullback cover?

Published on 26 Mar 2026 - 3:00

191

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Is the Pisot Triangle series known?

Published on 10 Apr 2026 - 22:57

List Question

closed embedding is open iff ideal sheaf idempotent

Blow-up along empty subvariety?

Is it true "If $X \subset Y$ then $\Bbb I(Y) \subset \Bbb I(X)$"(proper inclusion)?

Prove that $\mathcal {I} (H) = (F_1 \cdot F_2 \cdots F_s).$

Hartshorne Exercise 1.1.1(c)

Geometric Intuition behind Flatness

The valuation attached to a smooth point of an algebraic variety

Is one sheafification enough for the module inverse image?

What is a rational section of an invertible sheaf?

Show that there exist $a,b \in K [X_1,X_2,\cdots,X_n]$ and $d \in K[X_1,X_2,\cdots,X_{n-1}]$ such that $aF+bG = d.$

Explicit example of complete discrete valuation field with prescribed residue field

Polynomial Ring modulo Ideal is Polynomial ring of cosets of indeterminates.

Factor Theorem for Multivariate Polynomials

Does the covering involution lift to the pullback cover?

Is the Pisot Triangle series known?

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