List questions from commutative-algebra

221

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Is a smooth cubic in $\mathbb P^2(\mathbb C)$ never birational to a line in $\mathbb P^2(\mathbb C)$?

Published on 25 Mar 2026 - 14:12

148

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Properties of the Zariski topology on Proj

Published on 27 Mar 2026 - 11:51

81

Views

About definition of Fractional ideals: confusion (from Cohn's basic algebra)

Published on 22 Mar 2026 - 22:51

181

Views

Proving that $x\notin\mathbb{m}\implies$ $x$ is a unit, where $\mathbb{m}$ is a unique maximal ideal of $R$

Published on 25 Mar 2026 - 15:17

70

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Equivalent definitions of associated primes

Published on 25 Mar 2026 - 17:19

1k

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Finite Morphism of Schemes is Proper

Published on 28 Mar 2026 - 14:07

1.6k

Views

Finite Morphisms Closed

Published on 28 Mar 2026 - 13:52

64

Views

Complete spaces in algebra vs complete spaces in topology

Published on 27 Mar 2026 - 11:09

816

Views

A subring of $k[x,y]$ is not Noetherian even if $k$ is finite

Published on 05 Mar 2018 - 6:49

212

Views

A question about the injective hull of the residue field

Published on 05 Mar 2018 - 10:40

250

Views

Reduction Technique to consider Reduced Scheme

Published on 28 Mar 2026 - 13:59

112

Views

Are these two subrings of $\mathbb{C}\lbrack t\rbrack$ isomorphic?

Published on 07 Mar 2018 - 9:36

499

Views

Residue field at a point on a curve in a surface

Published on 25 Mar 2026 - 7:47

192

Views

Finding primary decomposition

Published on 28 Mar 2026 - 15:01

305

Views

Integral domain over which every non-constant irreducible polynomial has degree 1

Published on 22 Mar 2026 - 9:13

List Question

Is a smooth cubic in $\mathbb P^2(\mathbb C)$ never birational to a line in $\mathbb P^2(\mathbb C)$?

Properties of the Zariski topology on Proj

About definition of Fractional ideals: confusion (from Cohn's basic algebra)

Proving that $x\notin\mathbb{m}\implies$ $x$ is a unit, where $\mathbb{m}$ is a unique maximal ideal of $R$

Equivalent definitions of associated primes

Finite Morphism of Schemes is Proper

Finite Morphisms Closed

Complete spaces in algebra vs complete spaces in topology

A subring of $k[x,y]$ is not Noetherian even if $k$ is finite

A question about the injective hull of the residue field

Reduction Technique to consider Reduced Scheme

Are these two subrings of $\mathbb{C}\lbrack t\rbrack$ isomorphic?

Residue field at a point on a curve in a surface

Finding primary decomposition

Integral domain over which every non-constant irreducible polynomial has degree 1

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