Results 121 to 130 of about 1,595,421 (249)

An Extension of a result of Csiszar

International Journal of Mathematics and Mathematical Sciences, 1986
We extend the results of Csiszar (Z. Wahr. 5(1966) 279-295) to a topological semigroup S. Let μ be a measure defined on S. We consider the value of α=supKcompactlimn→∞supx∈Sμn(Kx−1). First. we show that the value of α is either zero or one.
P. B. Cerrito
doaj   +1 more source

UNDECIDABILITY AND THE DEVELOPABILITY OF PERMUTOIDS AND RIGID PSEUDOGROUPS

Forum of Mathematics, Sigma, 2017
A permutoid is a set of partial permutations that contains the identity and is such that partial compositions, when defined, have at most one extension in the set.
MARTIN R. BRIDSON, HENRY WILTON
doaj   +1 more source

On combinatorial inverse semigroups

, 1992
A characterization of all the simple (in the universal algebraci sense) combinatorial inverse semigroups, as well as of the monolith of the subdirectly irreducible ones, is obtained.
Agliano', Paolo
core   +1 more source

Idempotent 2x2 matrices over linearly ordered abelian groups [PDF]

Categories and General Algebraic Structures with Applications
In this paper we study multiplicative semigroups of $2\times 2$ matrices over a linearly ordered abelian group with an externally added bottom element. The multiplication of such a semigroup is defined by replacing addition and multiplication by join and
Valdis Laan, Marilyn Kutti
doaj   +1 more source

SEMILATTICE OF BISIMPLE INVERSE SEMIGROUPS

The Quarterly Journal of Mathematics, 1971
The purpose of this paper is to give a structure for a semigroup which is a semilattice of bisimple inverse semigroups and satisfies certain conditions. For such a semigroup, we characterize the idempotent separating congruences.
openaire   +2 more sources

K-Theory for Semigroup C*-Algebras and Partial Crossed Products. [PDF]

Commun Math Phys, 2022
Li X.
europepmc   +1 more source

Ordered Left Almost ⋇-Semihypergroups Based on Fuzzy Sets

Journal of Mathematics
The concept of an involution or anti-involution is a self-inverse linear mapping that plays a prominent role in the theory of algebraic structures, particularly rings, hyperrings, ordered semigroups, and ordered semihypergroups.
Nabilah Abughazalah, Naveed Yaqoob
doaj   +1 more source

Regularity and Green's Relations on a Semigroup of Transformations with Restricted Range

International Journal of Mathematics and Mathematical Sciences, 2008
Let T(X) be the full transformation semigroup on the set X and let T(X,Y)={α∈T(X):Xα⊆Y}. Then T(X,Y) is a sub-semigroup of T(X) determined by a nonempty subset Y of X.
Jintana Sanwong, Worachead Sommanee
doaj   +1 more source

Semigroup models for biochemical reaction networks. [PDF]

J Math Biol, 2023
Loutchko D.
europepmc   +1 more source

ALMOST FACTORIZABLE LOCALLY INVERSE SEMIGROUPS

, 2011
We introduce a notion of almost factorizability within the class of all locally inverse semigroups by requiring a property of order ideals, and we prove that the almost factorizable locally inverse semigroups are just the homomorphic images of Pastijn ...
MÁRIA B. SZENDREI
core   +1 more source