Question

Structure of finite commutative semigroup generated by two element.

score 196 · Answer 1 · 2026-03-17 22:42:22

196

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Structure of finite commutative semigroup generated by two element.

Published on 17 Mar 2026 - 22:42

score 105 · Answer 2 · 2018-05-05 17:45:36

105

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If $\left(E, \cdot\right)$ is a commutative semigroup of idempotents, then $\left(E,\leq\right)$ is an upper semilattice.

Published on 05 May 2018 - 17:45

score 209 · Answer 3 · 2026-03-16 21:03:18

209

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What is funny about monoids?

Published on 16 Mar 2026 - 21:03

score 603 · Answer 4 · 2026-03-16 22:08:29

603

Views

Is this structure a group?

Published on 16 Mar 2026 - 22:08

score 83 · Answer 5 · 2026-03-17 14:20:42

83

Views

Proving an alternative version of Lallement's Lemma

Published on 17 Mar 2026 - 14:20

score 108 · Answer 6 · 2026-03-17 02:47:25

108

Views

Equivalent condition on finite semigroup

Published on 17 Mar 2026 - 2:47

score 6.7k · Answer 7 · 2026-03-17 16:55:09

6.7k

Views

What is an example of a groupoid which is not a semigroup?

Published on 17 Mar 2026 - 16:55

score 169 · Answer 8 · 2018-05-23 11:25:50

169

Views

What can we conclude about $a$ if $a^2=a$ in a monoid or semigroup?

Published on 23 May 2018 - 11:25

score 379 · Answer 9 · 2018-05-23 12:05:06

379

Views

Example of a semigroup such that it contains a sub-semigroup which is a non-trivial group

Published on 23 May 2018 - 12:05

score 38 · Answer 10 · 2026-03-17 06:55:12

38

Views

Schreier varieties and Markov properties

Published on 17 Mar 2026 - 6:55

score 67 · Answer 11 · 2026-03-17 23:30:15

67

Views

Semigroup epimorphism that is not a quotient by a subsemigroup

Published on 17 Mar 2026 - 23:30

score 85 · Answer 12 · 2026-03-17 13:41:44

85

Views

The unit group as a homomorphic image in a semigroup

Published on 17 Mar 2026 - 13:41

score 156 · Answer 13 · 2026-03-17 23:03:00

156

Views

Partially-ordered and (semi-)lattice-ordered semigroups and monoids

Published on 17 Mar 2026 - 23:03

score 39 · Answer 14 · 2018-06-20 09:44:49

39

Views

Does every submonoid of $\mathbb N_{\ge 0}$ contained in some numerical semigroup?

Published on 20 Jun 2018 - 9:44

score 76 · Answer 15 · 2026-03-22 12:27:46

76

Views

Question on proof related to inclusion relations of principal ideals generated by elements.

Published on 22 Mar 2026 - 12:27

List Question

Structure of finite commutative semigroup generated by two element.

If $\left(E, \cdot\right)$ is a commutative semigroup of idempotents, then $\left(E,\leq\right)$ is an upper semilattice.

What is funny about monoids?

Is this structure a group?

Proving an alternative version of Lallement's Lemma

Equivalent condition on finite semigroup

What is an example of a groupoid which is not a semigroup?

What can we conclude about $a$ if $a^2=a$ in a monoid or semigroup?

Example of a semigroup such that it contains a sub-semigroup which is a non-trivial group

Schreier varieties and Markov properties

Semigroup epimorphism that is not a quotient by a subsemigroup

The unit group as a homomorphic image in a semigroup

Partially-ordered and (semi-)lattice-ordered semigroups and monoids

Does every submonoid of $\mathbb N_{\ge 0}$ contained in some numerical semigroup?

Question on proof related to inclusion relations of principal ideals generated by elements.

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