Results 41 to 50 of about 126,975 (166)

SIFAT KOMPAK DALAM RUANG HAUSDORFF

Jurnal Matematika, 2012
The inspiration of the definition of “compactness” comes from the real number system. Closed and bounded sets in the real line were considered as an excellent model to show a generalized version of the compactness in a topological space.
LUH PUTU IDA HARINI
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Countably z-compact spaces [PDF]

Archivum Mathematicum, 2014
In this note the author studies countably z-compact spaces and z-Lindelöf spaces. He relates countably z-compact spaces to pseudocompact spaces and he gives two characterizations of countably z-compact spaces (the first one in terms of z-filterbases and z-ideals, the second one in terms of closed graph multifunctions).
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Commutative Topological Semigroups Embedded into Topological Abelian Groups

Axioms, 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
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Finite products of filters that are compact relative to a class of filters

Applied General Topology, 2007
Filters whose product with every countable based countably compact filter is countably compact are characterized.
Francis Jordan, Iwo Labuda, Frédéric Mynard   +2 more
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Locally compact, $\omega_1$-compact spaces

, 2017
An $\omega_1$-compact space is a space in which every closed discrete subspace is countable. We give various general conditions under which a locally compact, $\omega_1$-compact space is $\sigma$-countably compact, i.e., the union of countably many countably compact spaces. These conditions involve very elementary properties.
Nyikos, Peter, Zdomskyy, Lyubomyr
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Net-Compact Hausdorff Topologies and Continuous Multi-Utility Representations for Closed Preorders

Axioms
In this paper, we deal with continuous multi-utility representations for closed preorders. We introduce the definition of a net-compact topology, which generalizes the concept of a sequentially compact topology.
Gianni Bosi, Gabriele Sbaiz, Magalì Zuanon   +2 more
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The Open Limit Point Compactness

Journal of Kufa for Mathematics and Computer, 2014
In this paper, we gave a new topological concept and we called it the open limit point compactness.We have proved that each of the compactness, and the limit point compactness is stronger than of the open limit point compactness., that is, compactness ...
AbedalHamza Mahdi Hamza
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Tachyons in compact spaces [PDF]

Journal of High Energy Physics, 2005
We discuss condensations of closed string tachyons localized in compact spaces. Time evolution of an on-shell condensation is naturally related to the worldsheet RG flow. Some explicit tachyonic compactifications of Type II string theory is considered, and some of them are shown to decay into supersymmetric theories known as the little string theories.
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Finite Unions of D-Spaces and Applications of Nearly Good Relation

Discrete Dynamics in Nature and Society, 2013
Some results are obtained on finite unions of D-spaces. It is proved that if a space is the union of finitely many locally compact D-subspaces, then it is a D-space. It follows that a space is a D-space if it is the union of finitely many locally compact
Xin Zhang, Hongfeng Guo, Yuming Xu
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Novel Classes of Bipolar Soft Generalized Topological Structures: Compactness and Homeomorphisms

Fuzzy Information and Engineering
The purpose of this paper is to define bipolar soft generalized compact sets and bipolar soft generalized compact spaces. The structures of g~~-centralized bipolar soft generalized closed sets collection in a bipolar soft generalized compact space are ...
Hind Y. Saleh, Baravan A. Asaad, Ramadhan A. Mohammed   +2 more
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