List questions from semigroups

Published on 06 May 2026 - 14:20

120

Views

make me idempotent!

Published on 04 May 2026 - 5:45

95

Views

Constructing free monoid from free semigroup

Published on 15 Apr 2026 - 3:21

94

Views

Groups in the generalized triple "semidirect" product of semigroups

Published on 14 Apr 2026 - 5:44

47

Views

Linear transformations with restricted range

Published on 12 Apr 2026 - 5:03

162

Views

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

Published on 16 Apr 2026 - 8:03

82

Views

Semigroup of differentiable functions on real line

Published on 04 May 2026 - 1:41

65

Views

isomorphism generalized semigroup

Published on 29 Apr 2026 - 12:51

204

Views

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

Published on 11 Apr 2026 - 21:50

99

Views

Example of a semigroup satisfy some properties

Published on 15 Apr 2026 - 1:09

112

Views

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

Published on 02 May 2026 - 0:28

190

Views

About Semigroup & Semiring homomorphism

Published on 29 Apr 2026 - 12:28

124

Views

About the group law on the extended square class group

Published on 12 Apr 2026 - 11:43

249

Views

Isometry of quadratic space

Published on 12 Apr 2026 - 19:36

64

Views

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

Published on 11 Apr 2026 - 1:55

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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