Results 11 to 20 of about 24,434 (204)

The Relationship between E-Semigroups and R-Semigroups

open access: yesJournal of Mathematics, 2023
A semigroup is called an E-semigroup (R-semigroup) if the set of all idempotents (the set of all regular elements) forms a subsemigroup. In this paper, we introduce the concept of V-semigroups and establish the relationship between the three classes of ...
Ze Gu
doaj   +1 more source

On Maximal Subgroups of Free Idempotent Generated Semigroups [PDF]

open access: yes, 2011
We prove the following results: (1) Every group is a maximal subgroup of some free idempotent generated semigroup. (2) Every finitely presented group is a maximal subgroup of some free idempotent generated semigroup arising from a finite semigroup.
Gray, Robert, Ruskuc, Nik
core   +2 more sources

ON HYBRID INTERIOR IDEALS IN SEMIGROUPS

open access: yesПроблемы анализа, 2019
In this paper, we introduce the notion of hybrid interior ideals and hybrid characteristic interior ideals of a semigroup. We obtain some equivalent conditions for a hybrid structure to be a hybrid interior ideal of a semigroup.
K. Porselvi, B. Elavarasan
doaj   +1 more source

Cross-connections and variants of the full transformation semigroup [PDF]

open access: yes, 2017
Cross-connection theory propounded by K. S. S. Nambooripad describes the ideal structure of a regular semigroup using the categories of principal left (right) ideals.
Muhammed, P. A. Azeef
core   +1 more source

Unary enhancements of inherently nonfinitely based semigroups [PDF]

open access: yes, 2013
We exhibit a simple condition under which a finite involutary semigroup whose semigroup reduct is inherently nonfinitely based is also inherently nonfinitely based as a unary semigroup.
Auinger, Karl   +3 more
core   +1 more source

New Properties of Anti Fuzzy Ideals of Regular Semigroups

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2019
In this article, we study some properties of anti-fuzzy sub-semigroup, anti fuzzy left (right, two sided) ideal, anti fuzzy ideal, anti fuzzy generalized bi-ideal, anti fuzzy interior ideals and anti fuzzy two sided ideal of regular semigroup.
Samah H. Asaad, Akram S. Mohammed
doaj   +1 more source

Semigroup of k-bi-Ideals of a Semiring with Semilattice Additive Reduct

open access: yesDemonstratio Mathematica, 2016
We associate a semigroup B(S) to every semiring S with semilattice additive reduct, namely the semigroup of all k-bi-ideals of S; and such semirings S have been characterized by this associated semigroup B(S). A semiring S is k-regular if and only if B(S)
Bhuniya A. K., Jana K.
doaj   +1 more source

Nuclearity of semigroup C*-algebras and the connection to amenability [PDF]

open access: yes, 2012
We study C*-algebras associated with subsemigroups of groups. For a large class of such semigroups including positive cones in quasi-lattice ordered groups and left Ore semigroups, we describe the corresponding semigroup C*-algebras as C*-algebras of ...
Li, Xin
core   +1 more source

Covers for regular semigroups and an application to complexity [PDF]

open access: yes, 1943
A major result of D.B. McAlister for inverse semigroups is generalised in the paper to classes of regular semigroups, including the class of all regular semigroups.
Trotter, P.G.
core   +1 more source

On Regular Semigroups and Their Multiplication [PDF]

open access: yesTransactions of the American Mathematical Society, 1974
A method is given for the construction of regular semigroups in terms of groups and partially ordered sets. This describes any regular semigroup S and its multiplication by means of triples ( i , g , λ ) \left ( {i,\,g,\,\lambda } \right ) with
openaire   +2 more sources

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