List questions from noncommutative-algebra

Published on 29 Mar 2026 - 14:28

80

Views

The set of (1,1)-entries of matrices in an ideal of $M_n(R)$ is an ideal in the ring $R$

Published on 08 Jul 2017 - 18:12

160

Views

One-sided ideals are two-sided ones

Published on 11 Jul 2017 - 10:16

445

Views

How do I prove these two definitions for a local ring are equivalent?

Published on 11 Jul 2017 - 15:44

87

Views

Are nilpotent elements in the right singular ideal?

Published on 12 Jul 2017 - 7:03

239

Views

A ring as a finite union of fields

Published on 19 Jul 2017 - 17:11

74

Views

$R$ right Noetherian. Is it true that $R(x)\otimes_{R[x]}R(x)\cong R(x)$?

Published on 27 Mar 2026 - 12:30

114

Views

Counting words formed by adjacent transpositions

Published on 27 Mar 2026 - 4:16

33

Views

Maximal left ideals and conjugacy

Published on 29 Jul 2017 - 15:51

155

Views

Conditions for injectivity of the multiplication map $Re\otimes_{eRe} eM\to M$

Published on 31 Jul 2017 - 13:45

225

Views

Is there any relationship between primitive rings and semi-prime rings? If yes, then what?

Published on 02 Aug 2017 - 16:01

116

Views

When is $R^{op}\cong R$?

Published on 26 Mar 2026 - 14:18

308

Views

Why Auslander and Reiten were so interested in Artin algebras?

Published on 04 Aug 2017 - 19:33

18

Views

(Lam Prop 5.6) R $\subseteq S$, then under what condition rad(S) $\cap$ R $\subseteq$ rad (R)?

Published on 07 Aug 2017 - 3:04

750

Views

Why do exponential functions of quaternions not work as expected?

Published on 09 Aug 2017 - 22:31

List Question

Introductory text on Hopf algebras

The set of (1,1)-entries of matrices in an ideal of $M_n(R)$ is an ideal in the ring $R$

One-sided ideals are two-sided ones

How do I prove these two definitions for a local ring are equivalent?

Are nilpotent elements in the right singular ideal?

A ring as a finite union of fields

$R$ right Noetherian. Is it true that $R(x)\otimes_{R[x]}R(x)\cong R(x)$?

Counting words formed by adjacent transpositions

Maximal left ideals and conjugacy

Conditions for injectivity of the multiplication map $Re\otimes_{eRe} eM\to M$

Is there any relationship between primitive rings and semi-prime rings? If yes, then what?

When is $R^{op}\cong R$?

Why Auslander and Reiten were so interested in Artin algebras?

(Lam Prop 5.6) R $\subseteq S$, then under what condition rad(S) $\cap$ R $\subseteq$ rad (R)?

Why do exponential functions of quaternions not work as expected?

Trending Questions

Popular # Hahtags

Popular Questions