Question

Example of commutative Hopf algebra over the integers

score 68 · Answer 1 · 2026-03-25 19:03:47

68

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Example of commutative Hopf algebra over the integers

Published on 25 Mar 2026 - 19:03

score 50 · Answer 2 · 2019-09-25 15:10:00

50

Views

At most one subring of fractional field is invertible ideal

Published on 25 Sep 2019 - 15:10

score 52 · Answer 3 · 2026-04-13 08:14:46

52

Views

Under what condition is the complement of a subring closed under multiplication?

Published on 13 Apr 2026 - 8:14

score 32 · Answer 4 · 2019-09-25 18:55:01

32

Views

$X$ an integral element over $K[X^d]$

Published on 25 Sep 2019 - 18:55

score 80 · Answer 5 · 2026-04-13 09:55:32

80

Views

Is $U^{-1} (A \otimes_R A) \cong U^{-1} A \otimes_R U^{-1} A$?

Published on 13 Apr 2026 - 9:55

score 369 · Answer 6 · 2026-04-10 19:05:08

369

Views

Relation between dualizing complex and cotangent complex

Published on 10 Apr 2026 - 19:05

score 178 · Answer 7 · 2026-03-25 01:17:43

178

Views

Projective modules of rank $n$ over a ring with $\operatorname{Pic}(R) = 0$

Published on 25 Mar 2026 - 1:17

score 113 · Answer 8 · 2026-04-13 00:18:12

113

Views

If $R$ is not a local ring can we say that $R_p$ is not faithfully flat as an $R$- module for any prime ideal $p$ of $R$?

Published on 13 Apr 2026 - 0:18

score 70 · Answer 9 · 2026-03-29 22:07:34

70

Views

Given a prime ideal $\mathfrak p\subset k[x,y,z]$, is $\mathfrak{p}^2$ a primary ideal?

Published on 29 Mar 2026 - 22:07

score 172 · Answer 10 · 2026-04-11 23:34:35

172

Views

Height of principal ideal in Valuation ring with non-principal maximal ideal

Published on 11 Apr 2026 - 23:34

score 177 · Answer 11 · 2026-04-11 03:08:54

177

Views

Simple minded details about why a particular map is étale

Published on 11 Apr 2026 - 3:08

score 290 · Answer 12 · 2026-04-10 17:07:03

290

Views

Can $A[x]$ be isomorphic to $A$ if $A$ is noetherian?

Published on 10 Apr 2026 - 17:07

score 102 · Answer 13 · 2026-04-04 01:02:19

Prove ${\sqrt {\operatorname {ann}_{R}(M)}}=\bigcap _{{{\mathfrak {p}}\in \operatorname {supp}M}}{\mathfrak {p}}$ for a finitely generated module $M$

score 166 · Answer 14 · 2026-04-11 14:58:30

166

Views

Localization and dual commute

Published on 11 Apr 2026 - 14:58

score 110 · Answer 15 · 2026-04-13 04:04:26

110

Views

An open subset of a special type of Grassmannian obtained from a local ring

Published on 13 Apr 2026 - 4:04

List Question

Example of commutative Hopf algebra over the integers

At most one subring of fractional field is invertible ideal

Under what condition is the complement of a subring closed under multiplication?

$X$ an integral element over $K[X^d]$

Is $U^{-1} (A \otimes_R A) \cong U^{-1} A \otimes_R U^{-1} A$?

Relation between dualizing complex and cotangent complex

Projective modules of rank $n$ over a ring with $\operatorname{Pic}(R) = 0$

If $R$ is not a local ring can we say that $R_p$ is not faithfully flat as an $R$- module for any prime ideal $p$ of $R$?

Given a prime ideal $\mathfrak p\subset k[x,y,z]$, is $\mathfrak{p}^2$ a primary ideal?

Height of principal ideal in Valuation ring with non-principal maximal ideal

Simple minded details about why a particular map is étale

Can $A[x]$ be isomorphic to $A$ if $A$ is noetherian?

Prove ${\sqrt {\operatorname {ann}_{R}(M)}}=\bigcap _{{{\mathfrak {p}}\in \operatorname {supp}M}}{\mathfrak {p}}$ for a finitely generated module $M$

Localization and dual commute

An open subset of a special type of Grassmannian obtained from a local ring

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