List questions from commutative-algebra

Published on 25 Mar 2026 - 16:38

144

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Classification of primary ideals of $\mathbb{Z}[X]/(X^2+d)$

Published on 16 Apr 2026 - 8:44

159

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Surjectivitiy is stable under base-change, concretely

Published on 13 Apr 2026 - 22:09

627

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Existence of a homogeneous system of parameters

Published on 12 Apr 2026 - 23:34

196

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Good ol' Diagram Chasing fun - is my kernel finitely generated?

Published on 25 Mar 2026 - 6:00

125

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When does computation of Euler characteristic of structural sheaf require non-singular algebraic surface?

Published on 15 Apr 2026 - 7:02

58

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What does it mean to be $0$ in $S^{-1} M$

Published on 13 Apr 2026 - 10:42

34

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$f(x)$ polynomial over field without repeated roots. Projective closure of $y^2=f(x)$ over field $k$ possibly non-singular curve for $\deg(f)\geq 4$?

Published on 16 Apr 2026 - 12:59

53

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Is the section of line bundle $O(m)$ over $P^1_k$ always non-singular?

Published on 15 Apr 2026 - 18:11

131

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A small question about dimension of varieties

Published on 13 Apr 2026 - 1:56

147

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Nilpotency of formal series over noetherian ring - I have doubt.

Published on 13 Apr 2026 - 21:05

42

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Integral ring homomorphisms exercise

Published on 25 Mar 2026 - 14:28

112

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Perfect pairing between cotangent space and tangent line

Published on 14 Apr 2026 - 18:52

83

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Question regarding faithfully flat module

Published on 15 Apr 2026 - 16:46

209

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If $M_c$ is finitely generated, then it is a principal ideal.

Published on 11 Apr 2026 - 17:33

List Question

Question regarding stably free module

Classification of primary ideals of $\mathbb{Z}[X]/(X^2+d)$

Surjectivitiy is stable under base-change, concretely

Existence of a homogeneous system of parameters

Good ol' Diagram Chasing fun - is my kernel finitely generated?

When does computation of Euler characteristic of structural sheaf require non-singular algebraic surface?

What does it mean to be $0$ in $S^{-1} M$

$f(x)$ polynomial over field without repeated roots. Projective closure of $y^2=f(x)$ over field $k$ possibly non-singular curve for $\deg(f)\geq 4$?

Is the section of line bundle $O(m)$ over $P^1_k$ always non-singular?

A small question about dimension of varieties

Nilpotency of formal series over noetherian ring - I have doubt.

Integral ring homomorphisms exercise

Perfect pairing between cotangent space and tangent line

Question regarding faithfully flat module

If $M_c$ is finitely generated, then it is a principal ideal.

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