List questions from idempotents

Published on 23 Feb 2026 - 5:40

628

Views

How can I find an idempotent element in a matrix ring?

Published on 18 Feb 2017 - 15:25

137

Views

A non-local corner ring

Published on 25 Mar 2026 - 15:54

35

Views

Proving the equality $eR\cap (I+J)=(eR\cap I)+(eR\cap J)$

Published on 06 Mar 2017 - 4:40

239

Views

Why is a connected finite dimensional wild path algebra is isomorphic to a special matrix algebra?

Published on 25 Mar 2026 - 6:05

138

Views

Idempotence question - proof checking

Published on 21 Mar 2017 - 10:33

298

Views

The number of esquares of idempotents in the rank 2 $\mathcal{D}$-class of $M_n(\mathbb{Z}_2)$.

Published on 25 Mar 2017 - 21:57

214

Views

Is every linear projection orthogonal with respect to some inner product?

Published on 26 Mar 2017 - 20:50

629

Views

Efficient Algorithm for generating idempotent matrices

Published on 27 Mar 2017 - 20:09

242

Views

Show that $\mathbb{Z}_n$ always has an even number of idempotents.

Published on 06 Apr 2017 - 14:13

157

Views

Prove that for every idempotent element a belonging to $A$ (ie such that $a^2 = a$) and for every $b$ belonging to $A$ then $ab = ba$.

Published on 11 Feb 2023 - 11:41

34

Views

An element commuting with all non-trivial idempotents is central in a simple ring

Published on 24 Mar 2023 - 16:02

548

Views

Does every commutative ring have $2^n$ idempotents?

Published on 01 Apr 2023 - 23:18

23

Views

(idempotent)Does $rank(A) + rank(A-I_n)=n$ implies $A^2=A$?

Published on 04 Jun 2023 - 9:52

249

Views

About idempotent matrices

Published on 04 Jun 2023 - 18:11

List Question

primitive idempotents in semisimple rings

How can I find an idempotent element in a matrix ring?

A non-local corner ring

Proving the equality $eR\cap (I+J)=(eR\cap I)+(eR\cap J)$

Why is a connected finite dimensional wild path algebra is isomorphic to a special matrix algebra?

Idempotence question - proof checking

The number of esquares of idempotents in the rank 2 $\mathcal{D}$-class of $M_n(\mathbb{Z}_2)$.

Is every linear projection orthogonal with respect to some inner product?

Efficient Algorithm for generating idempotent matrices

Show that $\mathbb{Z}_n$ always has an even number of idempotents.

Prove that for every idempotent element a belonging to $A$ (ie such that $a^2 = a$) and for every $b$ belonging to $A$ then $ab = ba$.

An element commuting with all non-trivial idempotents is central in a simple ring

Does every commutative ring have $2^n$ idempotents?

(idempotent)Does $rank(A) + rank(A-I_n)=n$ implies $A^2=A$?

About idempotent matrices

Trending Questions

Popular # Hahtags

Popular Questions