Results 91 to 100 of about 990 (221)

The Open Mapping and Closed Graph Theorem for Embeddable Topological Semigroups

, 1975
Some extensions of the open mapping and closed graph theorem are proved for certain classes of commutative topological semigroups, namely those embeddable as open subsets of topological groups.
Douglass L. Grant
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Analytical and topological theory of semigroups

, 1989
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische ...
Gesellschaft fuer Mathematische Forschung e.V., Oberwolfach (Germany). Mathematisches Forschungsinstitut
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The Set of Idempotents in the Weakly Almost Periodic Compactification of the Integers is not Closed [PDF]

, 2000
This paper answers negatively the question of whether the sets of idempotents in the weakly almost periodic compacti?cations of (N; +) and (Z; +) are ...
Pym, J.S., Bordbar, Behzad
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Some properties of linear right ideal nearrings

International Journal of Mathematics and Mathematical Sciences, 2003
In a previous paper, we determined all those topological nearrings 𝒩n whose additive groups are the n-dimensional Euclidean groups, n>1, and which contain n one-dimensional linear subspaces {Ji}i=1n which are also right ideals of the nearring with the ...
K. D. Magill
doaj   +1 more source

On Extensions over Semigroups and Applications

Entropy, 2016
Applying a theorem according to Rhemtulla and Formanek, we partially solve an open problem raised by Hochman with an affirmative answer. Namely, we show that if G is a countable torsion-free locally nilpotent group that acts by homeomorphisms on X, and
Wen Huang, Lei Jin, Xiangdong Ye
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Some nonmetric, first countable, cancellative topological semigroups that are generalized metric spaces

, 1992
A first countable topological group is metrizable. Certain nonfirst countable topological groups are “generalized metric spaces”. To elucidate the latter, we briefly list some theorems and examples.
Heath, R.W.
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Acting Fibrations and Lifting Functions in the Homotopy Theory of Single Intersection Graphs over Topological Semigroups

Mathematics
In this paper, we study the homotopy theory of single intersection graphs arising from acting spaces over topological semigroups. An acting space (S,B) is defined as a topological space B equipped with a continuous action of a topological semigroup S ...
Fozaiyah Alhubairah, Adem Kiliçman, Maryam F. Alshammari, Altaf Alshuhail   +3 more
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K-Theory for Semigroup C*-Algebras and Partial Crossed Products. [PDF]

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

On inverse submonoids of the monoid of almost monotone injective co-finite partial selfmaps of positive integers

Karpatsʹkì Matematičnì Publìkacìï, 2019
In this paper we study submonoids of the monoid $\mathscr{I}_{\infty}^{\,\Rsh\!\!\nearrow}(\mathbb{N})$ of almost monotone injective co-finite partial selfmaps of positive integers $\mathbb{N}$.
O.V. Gutik, A.S. Savchuk
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Topological structures on LA-semigroups

, 2013
In this short paper topological spaces using ideal theory on LA-semigroups are introduced. The formation of topological spaces guarantee preservation of finite intersection and arbitrary union between the set of ideals and the open subsets of resultant ...
Mohd Aizat bin Mohamad Nor
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