Results 21 to 30 of about 12,478 (182)

On a complete topological inverse polycyclic monoid

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2016
We give sufficient conditions when a topological inverse $\lambda$-polycyclic monoid $P_{\lambda}$ is absolutely $H$-closed in the class of topological inverse semigroups.
S.O. Bardyla, O.V. Gutik
doaj   +1 more source

Thickness in topological transformation semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
This article deals with thickness in topological transformation semigroups (τ-semigroups). Thickness is used to establish conditions guaranteeing an invariant mean on a function space defined on a τ-semigroup if there exists an invariant mean on its ...
Tyler Haynes
doaj   +1 more source

Right simple subsemigroups and right subgroups of compact convergence semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2000
Clifford and Preston (1961) showed several important characterizations of right groups. It was shown in Roy and So (1998) that, among topological semigroups, compact right simple or left cancellative semigroups are in fact right groups, and the closure ...
Phoebe Ho, Shing S. So
doaj   +1 more source

Amenability and geometry of semigroups [PDF]

open access: yes, 2017
We study the connection between amenability, Følner conditions and the geometry of finitely generated semigroups. Using results of Klawe, we show that within an extremely broad class of semigroups (encompassing all groups, left cancellative semigroups ...
Gray, Robert, Kambites, Mark
core   +1 more source

Commutative Topological Semigroups Embedded into Topological Abelian Groups

open access: yesAxioms, 2020
In this paper, we give conditions under which a commutative topological semigroup can be embedded algebraically and topologically into a compact topological Abelian group.
Julio César Hernández Arzusa
doaj   +1 more source

Topologically transitive matrix semigroups [PDF]

open access: yesOperators and Matrices, 2007
[1] R. DRNOVSEK, L. LIVSHITS, G. MACDONALD, B. MATHES, H. RADJAVI AND P. SEMRL, On transitive linear semigroups, Linear Algebra Appl., 305, 2000, 67–86. [2] F. KALSCHEUER, Die bestimmung aller stetigen fastkorper uber dem korper der rellen zahlen als grundkorper, Abh. Math. Sem. Hansische Univ. 13, 1940, 413–435. [3] H. RADJAVI AND P.
Leo Livshits   +2 more
openaire   +1 more source

Hypercyclic and mixing operator semigroups [PDF]

open access: yes, 2011
We describe a class of topological vector spaces admitting a mixing uniformly continuous operator group ${T_t}_{t\in\C^n}$ with holomorphic dependence on the parameter $t$. This result covers those existing in the literature.
Bonet   +6 more
core   +2 more sources

TOPOLOGICAL STRUCTURAL STABILITY ON PROJECTED SPACES

open access: yesSelecciones Matemáticas, 2016
In this work we study the topological structural stability for a family of nonlinear semigroups Th(·) on Banach spaces Xh which dependent on a parameter h.
Rodiak Figueroa   +3 more
doaj   +1 more source

Sum Connectivity Index Under the Cartesian and Strong Products Graph of Monogenic Semigroup

open access: yesInternational Journal of Analysis and Applications, 2023
This field’s main feature is to implement the sum connectivity index method. This sum connectivity index method can solve the monogenic semigroups under the cartesian and strong products.
R. Rajadurai, G. Sheeja
doaj   +1 more source

Embedding topological semigroups in topological groups [PDF]

open access: yesSemigroup Forum, 1970
In [6] Rothman investigated the problem of embedding a topological semigroup in a topological group. He defined a concept calledProperty F and showed that Property F is a necessary and sufficient condition for embedding a commutative, cancellative topological semigroup in its group of quotients as an open subset.
openaire   +3 more sources

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