Results 131 to 140 of about 6,087,542 (164)

Generators for a subgroup of finite index in the unit group of an integral semigroup ring

Journal of Group Theory, 2004
This paper is concerned with the unit group \(U_S\) of an integral semigroup ring \(\mathbb{Z} S\) of a finite semigroup \(S\). If \(\mathbb{Q} S\) is semisimple, then finitely many units \(u\in U_S\) with \([U_S:\langle u\rangle]
Dooms, Ann, Jespers, Eric
openaire   +2 more sources

On the generation of convolution semigroups on arbitrary locally compact groups II

Archiv der Mathematik, 1977
In his paper [4] G. A. Hunt described the generating functional of a convolution semigroup on a Lie group (representation theorem). Furthermore he has shown that conversely certain functionals determine convolution semigroups (generation theorem). V~. Hazod [2] extended these results to arbitrary locally compact groups by Lie gToup approximation. In [5]
openaire   +2 more sources

Actions of Finitely Generated Groups and Semigroups on a Plane by Means of Isometries

Mathematical Notes, 2004
Let \(G\) be a countable finitely generated group or semigroup equipped with a fixed set of generators, e.g., a group of isometries of an affine Euclidean plane. The author studies conditions under which orbits of the action of the group \(G\) are uniformly distributed and gives a criterion for every orbit to be dense.
openaire   +2 more sources

Compact symmetry groups and generators for sub-Markovian semigroups

Zeitschrift für Wahrscheinlichkeitstheorie und Verwandte Gebiete, 1983
We consider closed infinitesimal operators L with dense domain D in the algebra of all continuous functions, vanishing at infinity, on a given locally compact Hausdorff space X. Necessary and sufficient conditions are given for L to be the infinitesimal generator of a strongly continuous sub-Markovian semigroup on C0(X).
openaire   +2 more sources

On groups and semigroups of matrices with spectra in a finitely generated field

Linear and Multilinear Algebra, 2005
Let K be an algebraically closed field of characteristic zero and ...
openaire   +1 more source

On the uniform distribution of orbits of finitely generated groups and semigroups of plane isometries

Sbornik: Mathematics, 2004
Summary: Actions by isometries on a Euclidean plane of free groups and free semigroups with arbitrarily many generators and of free products of groups of order 2 are considered. It is shown that in the typical case, all orbits of the action are uniformly distributed in the plane.
openaire   +1 more source

On almost-symmetry in generalized numerical semigroups

Communications in Algebra, 2021
Carmelo Cisto
exaly  

Generalized BE-semigroups

Afrika Matematika, 2022
Kostaq Hila, Fawad Hussain, Saleem Abdullah   +2 more
exaly  

Time regularity for generalized Mehler semigroups

Mathematische Nachrichten, 2022
exaly  

Generalized inverses modulo ℋ in semigroups and rings

Linear and Multilinear Algebra, 2013
Pedro Patricio, Xavier Mary
exaly