Question

The minimal ideal of a finite semigroup whose idempotents commute

score 85 · Answer 1 · 2026-03-26 22:15:14

85

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The minimal ideal of a finite semigroup whose idempotents commute

Published on 26 Mar 2026 - 22:15

score 113 · Answer 2 · 2026-03-25 06:01:46

113

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Is a finite semigroup with a unique idempotent $e$ always a group with unit $e$?

Published on 25 Mar 2026 - 6:01

score 56 · Answer 3 · 2024-03-29 21:10:01

56

Views

When a semigroup homomorphism extends to a group homomorphism

Published on 29 Mar 2024 - 21:10

score 812 · Answer 4 · 2026-03-25 06:11:05

812

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Do the idempotents in an inverse semigroup commute?

Published on 25 Mar 2026 - 6:11

score 686 · Answer 5 · 2015-01-09 00:06:04

686

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rectangular groups are completely simple and orthodox

Published on 09 Jan 2015 - 0:06

score 391 · Answer 6 · 2015-01-09 20:45:02

391

Views

Is there a name for a regular semigroup with zero in which the product of any two different idempotents is zero?

Published on 09 Jan 2015 - 20:45

score 229 · Answer 7 · 2015-01-11 11:10:23

229

Views

Let $S$ be a completely regular semigroup, expressed as a semilattice $Y$ of completely simple semigroups $S_{\alpha}$ ($\alpha \in{Y})$

Published on 11 Jan 2015 - 11:10

score 56 · Answer 8 · 2015-01-11 11:46:07

56

Views

How to show that S/J is a chain where S is a semigroup with no proper generating sets

Published on 11 Jan 2015 - 11:46

score 1.9k · Answer 9 · 2015-01-13 21:39:03

1.9k

Views

Does a non-abelian semigroup without identity exist?

Published on 13 Jan 2015 - 21:39

score 108 · Answer 10 · 2015-01-22 20:09:19

108

Views

Semigroup satisfying the cancellation property which cannot be embedded in a group

Published on 22 Jan 2015 - 20:09

score 931 · Answer 11 · 2015-01-23 15:27:49

931

Views

Semigroups and solutions of equation

Published on 23 Jan 2015 - 15:27

score 149 · Answer 12 · 2015-01-27 11:34:07

149

Views

Find a first order sentence satisfied in every finite semigroup but not in every compact semigroup

Published on 27 Jan 2015 - 11:34

score 1.2k · Answer 13 · 2026-03-26 08:18:45

1.2k

Views

Associativity in category theory

Published on 26 Mar 2026 - 8:18

score 610 · Answer 14 · 2015-02-07 18:01:12

610

Views

Isomorphism of a semigroup S and (Aᴬ, ⋅).

Published on 07 Feb 2015 - 18:01

score 1.4k · Answer 15 · 2015-02-09 04:59:08

1.4k

Views

Prove that a finite semigroup G with identity is a group if and only if G contains only one idempotent

Published on 09 Feb 2015 - 4:59

List Question

The minimal ideal of a finite semigroup whose idempotents commute

Is a finite semigroup with a unique idempotent $e$ always a group with unit $e$?

When a semigroup homomorphism extends to a group homomorphism

Do the idempotents in an inverse semigroup commute?

rectangular groups are completely simple and orthodox

Is there a name for a regular semigroup with zero in which the product of any two different idempotents is zero?

Let $S$ be a completely regular semigroup, expressed as a semilattice $Y$ of completely simple semigroups $S_{\alpha}$ ($\alpha \in{Y})$

How to show that S/J is a chain where S is a semigroup with no proper generating sets

Does a non-abelian semigroup without identity exist?

Semigroup satisfying the cancellation property which cannot be embedded in a group

Semigroups and solutions of equation

Find a first order sentence satisfied in every finite semigroup but not in every compact semigroup

Associativity in category theory

Isomorphism of a semigroup S and (Aᴬ, ⋅).

Prove that a finite semigroup G with identity is a group if and only if G contains only one idempotent

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