Results 61 to 70 of about 366 (139)

Extensions of a Brandt Semigroup by Another

, 1970
One possible first step in considering the structure of a class of semigroups is to study the ideal extensions (here simply called “extensions“) of simple or 0-simple semigroups in by another if the latter are of known structure.
Gérard Lallement, Mario Petrich
core   +1 more source

Semigroup presentations

, 2012
In this thesis we consider in detail the following two fundamental problems for semigroup presentations: 1. Given a semigroup find a presentation defining it. 2. Given a presentation describe the semigroup defined by it.
Ruškuc, Nik
core  

On generators, relations and D-simplicity of direct products, Byleen extensions, and other semigroup constructions

, 2015
In this thesis we study two different topics, both in the context of semigroup constructions. The first is the investigation of an embedding problem, specifically the problem of whether it is possible to embed any given finitely presentable semigroup ...
Baynes, Samuel
core  

The class semigroup of local one-dimensional domains

, 2008
Let R be a local one-dimensional domain. We investigate when the class semigroup s(R) of R is a Clifford semigroup. We make use of the Archimedean valuation domains which dominate R, as a main tool to study its class semigroup.
Paolo Zanardo, ZANARDO, PAOLO
core   +1 more source

A Kind of Clifford Semigroup′s Portray

, 2009
g是一个群,I是一个指标集.令Cg=gxI={(g,I):g∈g,I∈I};(A,I)(b,J)=(Ab,k)WITH k=MIn{I,J}则Cg是一个半群.事实上,Cg是ClIffOrd半群,并且Cg代表了一类特殊的ClIffOrd半群.G is a group and I is a index set.LetCG=G×I={(g,i):g∈G,i∈I};(a,i)(b,j)=(ab,k) with k=min{i,j} then CG is exactly the semigroup.In fact,
邓伦治, 徐波
core  

pi-Regularity of Semigroup Graded Rings

, 2002
The notion of pi-regularity is a generalization of von Neumann regularity. In this paper we begin our investigation of pi-regular and strongly pi-regular semigroup graded rings.
Hema Gopalakrishnan, Gopalakrishnan, Hema   +1 more
core   +1 more source

The left regular *-representation of an inverse semigroup

, 1982
The left regular ∗ ^ * -representation of the semigroup algebra of an inverse semigroup is faithful. Clifford semigroups with a particular type of semilattice are shown to have the weak containment property if and only
J. R. Wordingham
core   +1 more source

Cayley automaton semigroups

, 2015
Let S be a semigroup, C(S) the automaton constructed from the right Cayley graph of S with respect to all of S as the generating set and ∑(C(S)) the automaton semigroup constructed from C(S). Such semigroups are termed Cayley automaton semigroups. For
McLeman, Alexander Lewis Andrew
core  

On positive definite functions and representations of Clifford ω-semigroups

Le Matematiche, 1995
It is known that a complex valued function f on a Clifford ω-semigroup, T=UnGn is positive definite if and only if its restriction fn to Gn, is positive definite for any positive integer n.
Liliana Pavel
doaj  

Endomorphisms of Clifford semigroups with injective structure homomorphisms

, 2020
In the present paper, we study semigroups of endomorphisms on Clifford semigroups with injective structure homomorphisms, where the semilattice has a least element. We describe such Clifford semigroups having a regular endomorphism monoid.
Worawiset, S., Koppitz, J.
core   +1 more source