Results 31 to 40 of about 4,922,109 (351)

Topological nodal line semimetals in holography

open access: yesJournal of High Energy Physics, 2018
We show a holographic model of a strongly coupled topological nodal line semimetal (NLSM) and find that the NLSM phase could go through a quantum phase transition to a topologically trivial state.
Yan Liu, Ya-Wen Sun
doaj   +1 more source

Topological invariants for holographic semimetals

open access: yesJournal of High Energy Physics, 2018
We study the behavior of fermion spectral functions for the holographic topological Weyl and nodal line semimetals. We calculate the topological invariants from the Green functions of both holographic semimetals using the topological Hamiltonian method ...
Yan Liu, Ya-Wen Sun
doaj   +1 more source

Countable Fuzzy Topological Space and Countable Fuzzy Topological Vector Space

open access: yesJournal of Mathematical and Fundamental Sciences, 2015
This paper deals with countable fuzzy topological spaces, a generalization of the notion of fuzzy topological spaces. A collection of fuzzy sets F on a universe X forms a countable fuzzy topology if in the definition of a fuzzy topology, the condition of
Apu Kumar Saha, Debasish Bhattacharya
doaj   +1 more source

New Types of Topologies and Neutrosophic Topologies (Improved Version) [PDF]

open access: yesNeutrosophic Sets and Systems, 2023
In this paper we recall the six new types of topologies, and their corresponding topological spaces, that we introduced in the last years (2019-20223), such as: NeutroTopology, AntiTopology, Refined Neutrosophic Topology, Refined Neutrosophic Crisp ...
Florentin Smarandache
doaj   +1 more source

A New Perspective On Soft Topology

open access: yesHittite Journal of Science and Engineering, 2018
In this paper, we approach the concept of soft topology with a different perspective. We define a soft topological space over given initial topological universe as a parameterization of subspaces of a topological space.
Mustafa Burç Kandemir
doaj   +1 more source

On Cubic Interval Vague Sets and Cubic Interval Vague Topological Spaces

open access: yesScience Journal of University of Zakho, 2022
 advance a modern extension formation of cubic vague sets identified as cubic interval vague sets (CIVSs).  similarly describe the idea of  cubic interval vague sets (ICIVSs)    cubic interval vague sets (ECIVSs) by examples  debate their exciting ...
Arsalan Shareef Haji   +1 more
doaj   +1 more source

A new approach to nearly paracompact spaces

open access: yesМатематичні Студії, 2023
The pre-open sets are a generalization of open sets of topological spaces. In this paper, we introduce and study a notion of po-paracompact spaces via pre-open sets on topological spaces.
A. Mukharjee
doaj   +1 more source

On the Weight of a Topological Space [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
The main result in this paper states that the weight of a regular space is the product of three cardinal functions, namely the Lindelöf degree, the pluming degree, and the point separating weight.
openaire   +1 more source

On soft topological space via semiopen and semiclosed soft sets [PDF]

open access: yes, 2012
This paper introduces semiopen and semiclosed soft sets in soft topological spaces. The notions of interior and closure are generalized using these sets.
J. Mahanta, P. Das
semanticscholar   +1 more source

Relative Smooth Topological Spaces

open access: yesAdvances in Fuzzy Systems, 2009
In 1992, Ramadan introduced the concept of a smooth topological space and relativeness between smooth topological space and fuzzy topological space in Chang's (1968) view points. In this paper we give a new definition of smooth topological space.
B. Ghazanfari
doaj   +1 more source

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