Results 71 to 80 of about 144,318 (259)

On endomorphisms of groups of order 36; pp. 237–254 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2016
There exist exactly 14 non-isomorphic groups of order 36. In this paper we will prove that three of them are not determined by their endomorphism semigroups in the class of all groups.
Alar Leibak, Peeter Puusemp
doaj   +1 more source

The cone of functionals on the Cuntz semigroup [PDF]

open access: yes, 2011
The functionals on an ordered semigroup S in the category Cu--a category to which the Cuntz semigroup of a C*-algebra naturally belongs--are investigated.
L. Robert
semanticscholar   +1 more source

A semigroup-like Property for Discrete Mittag-Leffler Functions

open access: yes, 2012
Discrete Mittag-Leffler function Eᾱ(λ,z) of order 0 < α ≤ 1, E1̄(λ,z)=(1-λ)-z, λ ≠ 1, satisfies the nabla Caputo fractional linear difference equation C∇0αx(t)=λx(t),x(0)=1,t∈ℕ1={1,2,3,…}. Computations can show that the semigroup identity Eᾱ(λ,z1)Eᾱ
T. Abdeljawad, F. Jarad, D. Baleanu
semanticscholar   +1 more source

Inverse semigroup expansions and their actions on C*-algebras [PDF]

open access: yes, 2011
In this work, we give a presentation of the prefix expansion Pr(G) of an inverse semigroup G as recently introduced by Lawson, Margolis and Steinberg which is similar to the universal inverse semigroup defined by the second named author in case G is a ...
Alcides Buss, R. Exel
semanticscholar   +1 more source

Representation functions of additive bases for abelian semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
A subset of an abelian semigroup is called an asymptotic basis for the semigroup if every element of the semigroup with at most finitely many exceptions can be represented as the sum of two distinct elements of the basis.
Melvyn B. Nathanson
doaj   +1 more source

Binomial Semigroups

open access: yesJournal of Algebra, 1998
A binomial semigroup is a semigroup with a finite set \(x_1,\dots,x_n\) of generators subject to \(\frac{n(n-1)}2\) relations of the type \(x_jx_i=x_kx_l\) with \(j>i ...
Jespers, Eric, Okninski, J.
openaire   +2 more sources

Valuation Semigroups of Two Dimensional Local Rings

open access: yes, 2014
We consider the question of when a semigroup is the semigroup of a valuation dominating a two dimensional noetherian local domain, giving some surprising examples.
Cutkosky, Steven Dale, Vinh, Pham An
core   +1 more source

On the closure of the extended bicyclic semigroup

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2011
In the paper we study the semigroup $mathscr{C}_{mathbb{Z}}$which is a generalization of the bicyclic semigroup. We describemain algebraic properties of the semigroup$mathscr{C}_{mathbb{Z}}$ and prove that every non-trivialcongruence $mathfrak{C}$ on the
I. R. Fihel, O. V. Gutik
doaj  

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