List questions from semigroups

Published on 20 Mar 2026 - 0:34

102

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make me idempotent!

Published on 21 Mar 2026 - 22:06

93

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Constructing free monoid from free semigroup

Published on 22 Mar 2026 - 15:00

91

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Groups in the generalized triple "semidirect" product of semigroups

Published on 17 Mar 2026 - 16:11

44

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Linear transformations with restricted range

Published on 22 Mar 2026 - 7:59

159

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Show that a semigroup with $aS \cup \{a\} = bS \cup \{b\}$ and $Sa \cup \{a\} = Sb \cup \{b\}$ is a group

Published on 31 Jul 2018 - 12:48

76

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Semigroup of differentiable functions on real line

Published on 22 Mar 2026 - 17:54

58

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isomorphism generalized semigroup

Published on 17 Mar 2026 - 5:28

201

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Show that a semigroup is semisimple iff $A^2 = A$ for every two-sided ideal $A$

Published on 01 Aug 2018 - 18:52

96

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Example of a semigroup satisfy some properties

Published on 22 Mar 2026 - 21:01

106

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Prove that there is no bijective homomorphism from $\left(\mathbb{Q},\ +\right)$ to $\left(\mathbb{Q_+^*},\ \times \right)$

Published on 17 Mar 2026 - 0:02

182

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About Semigroup & Semiring homomorphism

Published on 22 Mar 2026 - 10:08

121

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About the group law on the extended square class group

Published on 22 Mar 2026 - 18:10

246

Views

Isometry of quadratic space

Published on 22 Mar 2026 - 7:32

61

Views

(Corrected in Wikipedia) Every subsemigroup is in its own normalizer

Published on 21 Aug 2018 - 1:01

List Question

Inclusion relations between equationally defined classes of finite semigroups

make me idempotent!

Constructing free monoid from free semigroup

Groups in the generalized triple "semidirect" product of semigroups

Linear transformations with restricted range

Show that a semigroup with $aS \cup \{a\} = bS \cup \{b\}$ and $Sa \cup \{a\} = Sb \cup \{b\}$ is a group

Semigroup of differentiable functions on real line

isomorphism generalized semigroup

Show that a semigroup is semisimple iff $A^2 = A$ for every two-sided ideal $A$

Example of a semigroup satisfy some properties

Prove that there is no bijective homomorphism from $\left(\mathbb{Q},\ +\right)$ to $\left(\mathbb{Q_+^*},\ \times \right)$

About Semigroup & Semiring homomorphism

About the group law on the extended square class group

Isometry of quadratic space

(Corrected in Wikipedia) Every subsemigroup is in its own normalizer

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