List questions from idempotents

Published on 17 Apr 2017 - 11:36

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does there always exist a nonzero idempotent in a ring $R$

Published on 01 May 2017 - 2:43

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There is a non-trivial idempotent modulo $(f)$, where $f$ is a polynomial with at least two distinct irreducible factors

Published on 02 May 2017 - 3:21

220

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Finding different factorizations in rings with zero divisors

Published on 02 May 2017 - 4:53

203

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Infinite Intersection of ideals generated by idempotents

Published on 02 May 2017 - 22:24

178

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If a commutative ring is connected, then its reduced ring is connected.

Published on 04 May 2017 - 10:21

410

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When an ideal is generated by idempotents

Published on 05 May 2017 - 18:06

422

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When an ideal is generated by idempotents 2

Published on 06 May 2017 - 11:10

153

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A special subset of nilradical

Published on 07 May 2017 - 4:29

585

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Conditions for a regular semigroup to be a group.

Published on 15 May 2017 - 14:10

88

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When an ideal is locally comaximal with idempotents

Published on 15 May 2017 - 15:41

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If $A$ is idempotent, then the eigenvalues of $A$ are $0$ or $1$

Published on 27 May 2017 - 14:50

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Question about two idempotent symmetric matrices

Published on 28 May 2017 - 9:47

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Is it true that there exists idempotents $e,f\in R$ such that $I=Re,J=Rf$ where $ef=0$?

Published on 04 Jun 2017 - 7:14

427

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Definition of idempotent in category theory?

Published on 26 Mar 2026 - 13:16

List Question

Set of idempotent elements closed under addition: prove $a+a = 0, ab=ba$

does there always exist a nonzero idempotent in a ring $R$

There is a non-trivial idempotent modulo $(f)$, where $f$ is a polynomial with at least two distinct irreducible factors

Finding different factorizations in rings with zero divisors

Infinite Intersection of ideals generated by idempotents

If a commutative ring is connected, then its reduced ring is connected.

When an ideal is generated by idempotents

When an ideal is generated by idempotents 2

A special subset of nilradical

Conditions for a regular semigroup to be a group.

When an ideal is locally comaximal with idempotents

If $A$ is idempotent, then the eigenvalues of $A$ are $0$ or $1$

Question about two idempotent symmetric matrices

Is it true that there exists idempotents $e,f\in R$ such that $I=Re,J=Rf$ where $ef=0$?

Definition of idempotent in category theory?

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