Question

Is there a special name for a semigroup whose multiplication is a constant function?

score 160 · Answer 1 · 2011-03-28 16:11:01

160

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Is there a special name for a semigroup whose multiplication is a constant function?

Published on 28 Mar 2011 - 16:11

score 5.5k · Answer 2 · 2026-03-25 15:48:34

5.5k

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(Organic) Chemistry for Mathematicians

Published on 25 Mar 2026 - 15:48

score 2.2k · Answer 3 · 2026-03-28 13:27:21

2.2k

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Why is the free monoid free?

Published on 28 Mar 2026 - 13:27

score 480 · Answer 4 · 2026-03-22 18:16:31

480

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Inverse of the Grothendieck group construction?

Published on 22 Mar 2026 - 18:16

score 26.4k · Answer 5 · 2011-09-17 07:51:29

26.4k

Views

Right identity and Right inverse in a semigroup imply it is a group

Published on 17 Sep 2011 - 7:51

score 316 · Answer 6 · 2026-03-25 04:37:41

316

Views

Subsemigroup generated by an element contains unique idempotent

Published on 25 Mar 2026 - 4:37

score 98 · Answer 7 · 2011-10-30 08:28:32

98

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Nomenclature for distributive action between semigroups

Published on 30 Oct 2011 - 8:28

score 2.7k · Answer 8 · 2011-10-30 18:52:02

2.7k

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How to get a group from a semigroup

Published on 30 Oct 2011 - 18:52

score 2.1k · Answer 9 · 2011-11-06 08:41:21

2.1k

Views

When a semigroup can be embedded into a group

Published on 06 Nov 2011 - 8:41

score 1.3k · Answer 10 · 2011-11-15 14:14:19

1.3k

Views

Cayley tables for semigroups of order $\le 8$

Published on 15 Nov 2011 - 14:14

score 87 · Answer 11 · 2011-11-17 14:49:55

87

Views

$A$ is a subsemigroup of $S$ if and only if $A^{2}\subset A$

Published on 17 Nov 2011 - 14:49

score 1.2k · Answer 12 · 2011-11-19 11:28:59

1.2k

Views

A cyclic subsemigroup of a semigroup S that is a group

Published on 19 Nov 2011 - 11:28

score 81 · Answer 13 · 2011-11-19 16:42:30

81

Views

In a semigroup $S=\{a_1, \ldots, a_n\}$, any product $a_1 * \ldots * a_i, 1 \le i \le n$ is unique

Published on 19 Nov 2011 - 16:42

score 232 · Answer 14 · 2026-03-28 15:01:31

232

Views

Constructing a semigroup from a small category

Published on 28 Mar 2026 - 15:01

score 1.5k · Answer 15 · 2026-03-28 13:28:13

1.5k

Views

What can we learn about a group by studying its monoid of subsets?

Published on 28 Mar 2026 - 13:28

List Question

Is there a special name for a semigroup whose multiplication is a constant function?

(Organic) Chemistry for Mathematicians

Why is the free monoid free?

Inverse of the Grothendieck group construction?

Right identity and Right inverse in a semigroup imply it is a group

Subsemigroup generated by an element contains unique idempotent

Nomenclature for distributive action between semigroups

How to get a group from a semigroup

When a semigroup can be embedded into a group

Cayley tables for semigroups of order $\le 8$

$A$ is a subsemigroup of $S$ if and only if $A^{2}\subset A$

A cyclic subsemigroup of a semigroup S that is a group

In a semigroup $S=\{a_1, \ldots, a_n\}$, any product $a_1 * \ldots * a_i, 1 \le i \le n$ is unique

Constructing a semigroup from a small category

What can we learn about a group by studying its monoid of subsets?

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