Question

Fill in a partly filled in table such that it makes the magma $(M,*)$ associative, commutative, has an identity element and has no zero-elements.

score 232 · Answer 1 · 2026-02-23 15:33:31

232

Views

Fill in a partly filled in table such that it makes the magma $(M,*)$ associative, commutative, has an identity element and has no zero-elements.

Published on 23 Feb 2026 - 15:33

score 115 · Answer 2 · 2026-03-22 23:57:25

115

Views

Is the set of pushdown transductions closed under composition?

Published on 22 Mar 2026 - 23:57

score 46 · Answer 3 · 2020-10-24 11:29:09

46

Views

Examination of idempotent elements of the Catalan monoid

Published on 24 Oct 2020 - 11:29

score 35 · Answer 4 · 2020-10-25 13:06:00

35

Views

Being certain $G$ semigroup, is it group?

Published on 25 Oct 2020 - 13:06

score 39 · Answer 5 · 2020-10-26 00:18:19

39

Views

Method to show that an operator maps non-negative functions to non-negative functions

Published on 26 Oct 2020 - 0:18

score 20 · Answer 6 · 2026-03-26 23:09:25

20

Views

Zariski density of a matrix semigroup generated by Jordan blocks

Published on 26 Mar 2026 - 23:09

score 342 · Answer 7 · 2026-03-25 17:34:19

342

Views

A semigroup $\mathbb{N}\mathcal{A}$ is saturated in $M$ if and only if $\mathbb{N}\mathcal{A}=\text{Cone}(\mathcal{A})\cap M$

Published on 25 Mar 2026 - 17:34

score 133 · Answer 8 · 2026-03-26 17:32:24

133

Views

Existence of a neutral element in set with an associative internal law

Published on 26 Mar 2026 - 17:32

score 40 · Answer 9 · 2026-03-25 17:42:17

40

Views

My professor is asking us to find the semigroup reduct of the dihedral group D3, what is that?

Published on 25 Mar 2026 - 17:42

score 805 · Answer 10 · 2026-03-28 21:50:30

805

Views

From monoids to groups

Published on 28 Mar 2026 - 21:50

score 68 · Answer 11 · 2020-11-28 18:05:55

68

Views

Prove that every subset of $A$ is a subsemigroup of $A$.

Published on 28 Nov 2020 - 18:05

score 262 · Answer 12 · 2020-12-04 21:45:32

262

Views

Feller transition kernel gives rise to ${C}_0$-semigroup

Published on 04 Dec 2020 - 21:45

score 115 · Answer 13 · 2026-03-25 06:05:54

115

Views

In a finite semigroup, does each ideal (esp. the minimal ideal) have an idempotent?

Published on 25 Mar 2026 - 6:05

score 38 · Answer 14 · 2026-03-28 21:57:02

38

Views

Is there any reference for the optimal bound $3|M|-1$ in Simon factorization forest theorem?

Published on 28 Mar 2026 - 21:57

score 130 · Answer 15 · 2026-03-29 02:36:12

130

Views

Is $\left(K, - \right)$ a group, semigroup, or monoid?

Published on 29 Mar 2026 - 2:36

List Question

Fill in a partly filled in table such that it makes the magma $(M,*)$ associative, commutative, has an identity element and has no zero-elements.

Is the set of pushdown transductions closed under composition?

Examination of idempotent elements of the Catalan monoid

Being certain $G$ semigroup, is it group?

Method to show that an operator maps non-negative functions to non-negative functions

Zariski density of a matrix semigroup generated by Jordan blocks

A semigroup $\mathbb{N}\mathcal{A}$ is saturated in $M$ if and only if $\mathbb{N}\mathcal{A}=\text{Cone}(\mathcal{A})\cap M$

Existence of a neutral element in set with an associative internal law

My professor is asking us to find the semigroup reduct of the dihedral group D3, what is that?

From monoids to groups

Prove that every subset of $A$ is a subsemigroup of $A$.

Feller transition kernel gives rise to ${C}_0$-semigroup

In a finite semigroup, does each ideal (esp. the minimal ideal) have an idempotent?

Is there any reference for the optimal bound $3|M|-1$ in Simon factorization forest theorem?

Is $\left(K, - \right)$ a group, semigroup, or monoid?

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