Question

Correspondence between set of all $K$-linear homomorphisms and set of all irreducible idempotents

score 78 · Answer 1 · 2017-06-11 17:46:21

78

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Correspondence between set of all $K$-linear homomorphisms and set of all irreducible idempotents

Published on 11 Jun 2017 - 17:46

score 236 · Answer 2 · 2026-02-23 09:29:20

236

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$(eR)_R$ is a semisimple right $R$-module $\implies$ $eRe$ is a semisimple ring

Published on 23 Feb 2026 - 9:29

score 68 · Answer 3 · 2026-03-26 18:56:32

68

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If $e_1, e_2$ are commuting idempotents whose difference lies in the Jacobson radical then $e_1 = e_2$

Published on 26 Mar 2026 - 18:56

score 1.5k · Answer 4 · 2017-06-19 12:13:14

1.5k

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Ring of $\mathbb{Z}_2$-valued functions

Published on 19 Jun 2017 - 12:13

score 542 · Answer 5 · 2017-07-14 12:02:21

542

Views

Let $E$ be an idempotent matrix different from the identity, then $\det(E) = 0$

Published on 14 Jul 2017 - 12:02

score 2.6k · Answer 6 · 2017-08-13 06:32:55

2.6k

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an idempotent ideal is generated by an idempotent?

Published on 13 Aug 2017 - 6:32

score 520 · Answer 7 · 2017-08-14 20:37:41

520

Views

Is every commutative ring without non trivial idempotent ,local?

Published on 14 Aug 2017 - 20:37

score 381 · Answer 8 · 2017-08-17 17:36:56

381

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Only idempotent elements of a ring

Published on 17 Aug 2017 - 17:36

score 1.7k · Answer 9 · 2017-08-18 10:10:51

1.7k

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Prove that a matrix is idempotent

Published on 18 Aug 2017 - 10:10

score 129 · Answer 10 · 2017-09-07 21:37:19

129

Views

Why is the idempotent $\operatorname{Br}_P(i)$ primitive?

Published on 07 Sep 2017 - 21:37

score 60 · Answer 11 · 2026-02-23 13:46:00

60

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Idempotent that isn't any of these

Published on 23 Feb 2026 - 13:46

score 285 · Answer 12 · 2026-03-26 17:36:52

285

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If $A\simeq\prod A_i$ then $\sum e_i=1$

Published on 26 Mar 2026 - 17:36

score 62 · Answer 13 · 2017-09-24 14:02:55

62

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$R$ is a ring which satisfies the following situation, $\exists n \ge 2; \forall x \in R; x^n = x$

Published on 24 Sep 2017 - 14:02

score 69 · Answer 14 · 2026-03-26 13:52:18

69

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idempotence number

Published on 26 Mar 2026 - 13:52

score 1.2k · Answer 15 · 2017-09-30 11:57:25

1.2k

Views

Counting idempotent $2×2$ matrices over $\mathbb{R}$

Published on 30 Sep 2017 - 11:57

List Question

Correspondence between set of all $K$-linear homomorphisms and set of all irreducible idempotents

$(eR)_R$ is a semisimple right $R$-module $\implies$ $eRe$ is a semisimple ring

If $e_1, e_2$ are commuting idempotents whose difference lies in the Jacobson radical then $e_1 = e_2$

Ring of $\mathbb{Z}_2$-valued functions

Let $E$ be an idempotent matrix different from the identity, then $\det(E) = 0$

an idempotent ideal is generated by an idempotent?

Is every commutative ring without non trivial idempotent ,local?

Only idempotent elements of a ring

Prove that a matrix is idempotent

Why is the idempotent $\operatorname{Br}_P(i)$ primitive?

Idempotent that isn't any of these

If $A\simeq\prod A_i$ then $\sum e_i=1$

$R$ is a ring which satisfies the following situation, $\exists n \ge 2; \forall x \in R; x^n = x$

idempotence number

Counting idempotent $2×2$ matrices over $\mathbb{R}$

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