List questions from noncommutative-algebra

Published on 12 Feb 2015 - 13:04

279

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Non-commutative ring (not necessarily with multiplicative identity) of order $n$ exists if and only if $p^2|n$ for some prime $p$?

Published on 13 Feb 2015 - 13:57

365

Views

Prime which is not irreducible in non-commutative ring with unity without zero divisors

Published on 14 Feb 2015 - 7:11

319

Views

How do I find the spectrum of a ring?

Published on 18 Feb 2015 - 9:49

256

Views

Example of the semisimple ring $R$ but $R^{{\rm op}}$ is not.

Published on 21 Feb 2015 - 14:17

1.6k

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Ideal of nilpotent elements in non-commutative ring.

Published on 22 Feb 2015 - 18:14

760

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Socle of a ring $R$

Published on 31 Mar 2026 - 18:22

1.3k

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Semisimplicity is equivalent to each simple left module is projective?

Published on 28 Mar 2026 - 23:57

1.1k

Views

Rank as norm on matrix

Published on 04 Mar 2015 - 11:23

159

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Powers in non-commutative rings

Published on 10 Mar 2015 - 0:56

488

Views

Finitely generated idempotent ideal

Published on 14 Mar 2015 - 17:21

2.5k

Views

Zero divisors in matrix rings

Published on 14 Mar 2015 - 18:05

142

Views

How to find all ring structures over $C_2\times C_2$?

Published on 23 Feb 2026 - 10:16

1.8k

Views

The expression "commute to something"

Published on 22 Mar 2015 - 2:03

124

Views

Equivalence of Semisimplicity

Published on 23 Mar 2015 - 14:53

List Question

Tensor product and opposite rings

Non-commutative ring (not necessarily with multiplicative identity) of order $n$ exists if and only if $p^2|n$ for some prime $p$?

Prime which is not irreducible in non-commutative ring with unity without zero divisors

How do I find the spectrum of a ring?

Example of the semisimple ring $R$ but $R^{{\rm op}}$ is not.

Ideal of nilpotent elements in non-commutative ring.

Socle of a ring $R$

Semisimplicity is equivalent to each simple left module is projective?

Rank as norm on matrix

Powers in non-commutative rings

Finitely generated idempotent ideal

Zero divisors in matrix rings

How to find all ring structures over $C_2\times C_2$?

The expression "commute to something"

Equivalence of Semisimplicity

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