Results 71 to 80 of about 4,879,805 (235)

N-Fuzzy BI-Topological Space and Separation Axioms

open access: yesJournal of New Theory, 2018
In this article, we introduced N-fuzzy bi-topological space by using the conceptsof fuzzy bi-topological space. We further define some basic properties of N-fuzzy bi-topologicalspaces, secondly we study the concepts of natural separation axioms of bi ...
Muhammad Shahzad   +3 more
doaj  

Ways of obtaining topological measures on locally compact spaces [PDF]

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2018
Topological measures and quasi-linear functionals generalize measures and li\-near functionals. Deficient topological measures, in turn, generalize topological measures.
S. V. Butler
doaj   +1 more source

Unified characterization for higher-order topological phase transitions

open access: yesPhysical Review Research, 2023
Higher-order topological phase transitions (HOTPTs) are associated with closing either the bulk energy gap (type-I) or boundary energy gap (type-II) without changing symmetry, and conventionally, both transitions are captured in real space and ...
Wei Jia   +4 more
doaj   +1 more source

On soft topological spaces

open access: yesComputers & Mathematics with Applications, 2011
AbstractIn the present paper we introduce soft topological spaces which are defined over an initial universe with a fixed set of parameters. The notions of soft open sets, soft closed sets, soft closure, soft interior points, soft neighborhood of a point and soft separation axioms are introduced and their basic properties are investigated.
Muhammad Shabir, Munazza Naz
openaire   +2 more sources

A Topological Structure Model and a Nonlinear Formation Model of ZnO Tetrapods

open access: yesКонденсированные среды и межфазные границы, 2019
Objectives. Development of a generalised mathematical model of hierarchical crystalline nanoforms of zinc oxide tetrapods produced by vapor transport synthesis under the conditions of chaotic particle dynamics. Methods and methodology.
Sviatoslav V. Avilov   +2 more
doaj   +1 more source

Topological nodal-line fermions in spin-orbit metal PbTaSe2

open access: yesNature Communications, 2016
Topological semimetals can support one-dimensional Fermi lines or zero-dimensional Weyl points in momentum space, where the valence and conduction bands touch.
G. Bian   +23 more
semanticscholar   +1 more source

Policy mobilities as comparison: urbanization processes, repeated instances, topologies

open access: yesRevista de Administração Pública, 2018
Following on from calls to reformat comparative urban methods to support global urban studies, this paper draws inspiration from policy mobilities to explore how the genetic interconnectedness of urban processes and outcomes can be mobilised ...
Jennifer Robinson
doaj   +2 more sources

On Space's Topology

open access: yes, 2010
It seems to be a common belief that the space in which we live is a space-time manifold of dimension at least four. In the present article we wish to draw attention to a slightly different possibility - a space-time pseudomanifold (or even a generalized pseudomanifold of one dimension or another).
openaire   +2 more sources

On resolvability of topological spaces

open access: yesTopology and its Applications, 2002
AbstractResolvability of spaces whose extent (spread) is less than the dispersion character is investigated. A space X with a π-network of regular closed subsets such that Δ(X)>pext(X) is ℵ0-resolvable, and a space Y such that Δ(Y)>ps(Y) is maximally resolvable. In particular, assuming the negation of the continuum hypothesis, a (hereditarily) Lindelöf
openaire   +2 more sources

Knowledge space theory and union-closed sets conjecture [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2016
The knowledge space theory provides a framework for knowledge management. One of major problems is to find core information for a body of knowledge.
Chatchawan Panraksa
doaj  

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