Question

An interesting problem about a "quasi ideal"

score 56 · Answer 1 · 2026-04-09 13:09:59

56

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An interesting problem about a "quasi ideal"

Published on 09 Apr 2026 - 13:09

score 1.9k · Answer 2 · 2026-04-10 00:18:30

1.9k

Views

Show that 3Z is not isomorphic to 5Z (when dealing with rings)

Published on 10 Apr 2026 - 0:18

score 3.8k · Answer 3 · 2026-04-09 15:57:48

3.8k

Views

Is $2\mathbb{Z}$ ring isomorphic to $4\mathbb{Z}$?

Published on 09 Apr 2026 - 15:57

score 710 · Answer 4 · 2026-04-11 10:39:17

710

Views

Zero divisor in ring without unity

Published on 11 Apr 2026 - 10:39

score 1.2k · Answer 5 · 2026-04-12 06:48:23

1.2k

Views

In the ring $6\mathbb{Z}$ is $12\mathbb{Z}$ maximal ideal but not prime ideal?

Published on 12 Apr 2026 - 6:48

score 732 · Answer 6 · 2026-04-14 10:37:06

732

Views

Pierce decomposition of a (not necessarily commutative) ring and the cartesian product

Published on 14 Apr 2026 - 10:37

score 95 · Answer 7 · 2026-04-14 03:34:03

95

Views

Does $\operatorname{End}_R(R)\cong R^{\text{op}}$ still hold when $R$ doesn't have an identity?

Published on 14 Apr 2026 - 3:34

score 1.6k · Answer 8 · 2026-04-17 13:58:30

1.6k

Views

Smallest subring of $\mathbb Q$ containing $3/10$

Published on 17 Apr 2026 - 13:58

score 433 · Answer 9 · 2026-04-14 10:44:48

433

Views

Product of Principal Ideals when $R$ is commutative, but not necessarily unital

Published on 14 Apr 2026 - 10:44

score 429 · Answer 10 · 2026-04-14 22:10:54

429

Views

$R$ is a prime right Goldie ring which contains a minimal right ideal. Show that $R$ must be a simple Artinian ring.

Published on 14 Apr 2026 - 22:10

score 50 · Answer 11 · 2026-04-14 13:51:06

50

Views

Finitely generated module over non-unital ring

Published on 14 Apr 2026 - 13:51

score 51 · Answer 12 · 2026-04-12 19:07:11

51

Views

Orthogonal idempotents in rings without unity?

Published on 12 Apr 2026 - 19:07

score 33 · Answer 13 · 2026-04-11 08:04:56

33

Views

What is the chance of getting same decimals of percentage 4 times in a row with RNG?

Published on 11 Apr 2026 - 8:04

score 20 · Answer 14 · 2026-04-10 23:26:12

20

Views

Generated Ideal Set Representation

Published on 10 Apr 2026 - 23:26

score 29 · Answer 15 · 2026-04-10 18:35:27

29

Views

Matrix construction of Dorroh extension

Published on 10 Apr 2026 - 18:35

List Question

An interesting problem about a "quasi ideal"

Show that 3Z is not isomorphic to 5Z (when dealing with rings)

Is $2\mathbb{Z}$ ring isomorphic to $4\mathbb{Z}$?

Zero divisor in ring without unity

In the ring $6\mathbb{Z}$ is $12\mathbb{Z}$ maximal ideal but not prime ideal?

Pierce decomposition of a (not necessarily commutative) ring and the cartesian product

Does $\operatorname{End}_R(R)\cong R^{\text{op}}$ still hold when $R$ doesn't have an identity?

Smallest subring of $\mathbb Q$ containing $3/10$

Product of Principal Ideals when $R$ is commutative, but not necessarily unital

$R$ is a prime right Goldie ring which contains a minimal right ideal. Show that $R$ must be a simple Artinian ring.

Finitely generated module over non-unital ring

Orthogonal idempotents in rings without unity?

What is the chance of getting same decimals of percentage 4 times in a row with RNG?

Generated Ideal Set Representation

Matrix construction of Dorroh extension

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