List questions from semigroups

Published on 10 Jul 2017 - 9:06

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Group Congruence on a Free monogenic semigroup

Published on 25 Mar 2026 - 18:55

133

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Putnam: Understanding a proof that a cancellative semigroup $S$ s.t. for any $s\in S$ the set of powers of $s$ is finite, is a group.

Published on 16 Jul 2017 - 1:36

149

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unitary subset of a semigroup $S$

Published on 24 Jul 2017 - 2:09

31

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Semicharacters of $\mathbb{R}_+$

Published on 26 Jul 2017 - 16:38

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Some non-trivial algebraic structures $(S,\cdot,)$ satisfying $x(y\cdot z)=xyz$

Published on 29 Jul 2017 - 8:33

110

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Munn semigroup and their properties

Published on 25 Mar 2026 - 9:24

135

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Principal factors of an inverse semigroup $S$ are Brandt semigroup except for the kernel, which is a group

Published on 25 Mar 2026 - 7:44

80

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Irreducible representations of compact semigroups

Published on 23 Aug 2017 - 17:26

84

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A question on Finite Semigroup

Published on 26 Mar 2026 - 3:46

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The set of primes of the form $a^2+8b^2$, where $a,b\in\mathbb N_+$

Published on 03 Sep 2017 - 13:47

210

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Let $G$ be a semigroup, prove the following statement

Published on 08 Sep 2017 - 22:39

139

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$\mathcal{J}-$ trivial elements

Published on 22 Mar 2026 - 15:59

458

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Is a finite semigroup having left cancellation property necessarily a group?

Published on 21 Sep 2017 - 4:54

1.3k

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Prove the following properties of given semigroup.

Published on 26 Sep 2017 - 17:59

List Question

Baer-levi semigroup and Green's Relation

Group Congruence on a Free monogenic semigroup

Putnam: Understanding a proof that a cancellative semigroup $S$ s.t. for any $s\in S$ the set of powers of $s$ is finite, is a group.

unitary subset of a semigroup $S$

Semicharacters of $\mathbb{R}_+$

Some non-trivial algebraic structures $(S,\cdot,)$ satisfying $x(y\cdot z)=xyz$

Munn semigroup and their properties

Principal factors of an inverse semigroup $S$ are Brandt semigroup except for the kernel, which is a group

Irreducible representations of compact semigroups

A question on Finite Semigroup

The set of primes of the form $a^2+8b^2$, where $a,b\in\mathbb N_+$

Let $G$ be a semigroup, prove the following statement

$\mathcal{J}-$ trivial elements

Is a finite semigroup having left cancellation property necessarily a group?

Prove the following properties of given semigroup.

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