Question

Structure of finite commutative semigroup generated by two element.

score 200 · Answer 1 · 2026-05-06 07:31:28

200

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Structure of finite commutative semigroup generated by two element.

Published on 06 May 2026 - 7:31

score 109 · Answer 2 · 2026-05-05 11:29:09

109

Views

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

Published on 05 May 2026 - 11:29

score 216 · Answer 3 · 2026-05-05 14:31:27

216

Views

What is funny about monoids?

Published on 05 May 2026 - 14:31

score 608 · Answer 4 · 2026-05-06 02:29:59

608

Views

Is this structure a group?

Published on 06 May 2026 - 2:29

score 90 · Answer 5 · 2026-05-05 22:30:07

90

Views

Proving an alternative version of Lallement's Lemma

Published on 05 May 2026 - 22:30

score 113 · Answer 6 · 2026-05-05 13:10:22

113

Views

Equivalent condition on finite semigroup

Published on 05 May 2026 - 13:10

score 6.7k · Answer 7 · 2026-05-02 12:54:42

6.7k

Views

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

Published on 02 May 2026 - 12:54

score 173 · Answer 8 · 2026-05-05 04:44:15

173

Views

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

Published on 05 May 2026 - 4:44

score 383 · Answer 9 · 2026-05-05 15:52:28

383

Views

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

Published on 05 May 2026 - 15:52

score 41 · Answer 10 · 2026-05-05 03:13:56

41

Views

Schreier varieties and Markov properties

Published on 05 May 2026 - 3:13

score 71 · Answer 11 · 2026-05-05 13:35:05

71

Views

Semigroup epimorphism that is not a quotient by a subsemigroup

Published on 05 May 2026 - 13:35

score 89 · Answer 12 · 2026-05-05 03:16:08

89

Views

The unit group as a homomorphic image in a semigroup

Published on 05 May 2026 - 3:16

score 160 · Answer 13 · 2026-05-05 07:44:56

160

Views

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

Published on 05 May 2026 - 7:44

score 43 · Answer 14 · 2026-05-05 16:08:17

43

Views

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

Published on 05 May 2026 - 16:08

score 82 · Answer 15 · 2026-05-05 14:52:58

82

Views

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

Published on 05 May 2026 - 14:52

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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