List questions from semigroups

Published on 23 Feb 2026 - 13:45

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A right group is the direct product of a group and a right zero semigroup.

Published on 23 Feb 2026 - 13:45

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Open Problems in Semigroup Theory.

Published on 11 May 2017 - 17:50

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Presentation of the shift-replace monoid

Published on 28 Mar 2026 - 0:06

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Question about Green's relations $L , R$ of semigroup.

Published on 13 May 2017 - 16:43

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The equivalence $\mathcal{L}^*$.

Published on 25 Mar 2026 - 18:52

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Conditions for a regular semigroup to be a group.

Published on 27 Mar 2026 - 7:14

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Definition of a least group congruence

Published on 16 May 2017 - 16:51

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On a function from a group with values lying in an inner product space

Published on 18 May 2017 - 17:30

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Elements of monoids divisible by arbitrary powers of a particular element

Published on 28 Mar 2026 - 4:34

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Free regular semigroups!

Published on 25 Mar 2026 - 9:22

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Generates $\Bbb{R}$ as a closed subgroup v.s. as a closed subsemigroup

Published on 14 Jun 2017 - 20:59

19

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Simplest uniform semilattice $C_{\omega}$

Published on 27 Jun 2017 - 11:27

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growth function of f.g semigroups

Published on 04 Jul 2017 - 14:34

188

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Semigroup with cancellative property

Published on 06 Jul 2017 - 5:02

List Question

The direct product $G\times E$ of a group $G$ with a right zero semigroup $E$ is a right group.

A right group is the direct product of a group and a right zero semigroup.

Open Problems in Semigroup Theory.

Presentation of the shift-replace monoid

Question about Green's relations $L , R$ of semigroup.

The equivalence $\mathcal{L}^*$.

Conditions for a regular semigroup to be a group.

Definition of a least group congruence

On a function from a group with values lying in an inner product space

Elements of monoids divisible by arbitrary powers of a particular element

Free regular semigroups!

Generates $\Bbb{R}$ as a closed subgroup v.s. as a closed subsemigroup

Simplest uniform semilattice $C_{\omega}$

growth function of f.g semigroups

Semigroup with cancellative property

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