List questions from noncommutative-algebra

Published on 21 Jul 2013 - 7:08

69

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Weak flat condition?

Published on 22 Jul 2013 - 22:13

246

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Simple + Artinian = Semiprimitive

Published on 25 Mar 2026 - 16:06

1.3k

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What does Herstein mean by 'centroid of a ring'?

Published on 25 Mar 2026 - 9:36

194

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Let $R$ be a unitary noncommutative Artinian ring, how can I prove that $M_n(R)$ is Artinian?

Published on 30 Jul 2013 - 15:01

3.8k

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Is a finitely generated projective module a direct summand of a finitely generated free module?

Published on 29 Mar 2026 - 17:58

122

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How to check linear independence of these vectors?

Published on 06 Aug 2013 - 20:18

43

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Regarding splitting in the Brauer group over fields of prime characteristic.

Published on 27 Mar 2026 - 8:16

125

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Is there a right semihereditary domain which isn't right Ore?

Published on 12 Aug 2013 - 14:30

189

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Is there an analog of Cech complex for local cohomology over noncommutative rings?

Published on 26 Aug 2013 - 14:06

109

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Simple components of a semisimple $K$-algebra

Published on 27 Aug 2013 - 15:08

446

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Have I found a counterexample to Noether-Skolem? (No, but I am confused...)

Published on 27 Aug 2013 - 17:31

1.5k

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Left and Right Ideal Generated by Two Matrices.

Published on 04 Sep 2013 - 9:49

1.9k

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A ring with few invertible elements

Published on 23 Feb 2026 - 17:21

1.1k

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Matrices $B$ that commute with every matrix commuting with $A$

Published on 18 Sep 2013 - 19:16

List Question

Left Multiplication Ring Homomorphism

Weak flat condition?

Simple + Artinian = Semiprimitive

What does Herstein mean by 'centroid of a ring'?

Let $R$ be a unitary noncommutative Artinian ring, how can I prove that $M_n(R)$ is Artinian?

Is a finitely generated projective module a direct summand of a finitely generated free module?

How to check linear independence of these vectors?

Regarding splitting in the Brauer group over fields of prime characteristic.

Is there a right semihereditary domain which isn't right Ore?

Is there an analog of Cech complex for local cohomology over noncommutative rings?

Simple components of a semisimple $K$-algebra

Have I found a counterexample to Noether-Skolem? (No, but I am confused...)

Left and Right Ideal Generated by Two Matrices.

A ring with few invertible elements

Matrices $B$ that commute with every matrix commuting with $A$

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