Results 41 to 50 of about 4,922,109 (351)

Topological Rough Groups

open access: yesTopological Algebra and its Applications, 2016
The concept of topological group is a simple combination of the concepts of abstract group and topological space. The purpose of this paper is to combine the concepts of topological space and rough groups; called topological rough groups on an ...
Bağırmaz Nurettin   +2 more
doaj   +1 more source

Closed subsets of compact-like topological spaces

open access: yesApplied General Topology, 2020
We investigate closed subsets (subsemigroups, resp.) of compact-like topological spaces (semigroups, resp.). We show that each Hausdorff topological space is a closed subspace of some Hausdorff ω-bounded pracompact topological space and describe open ...
Serhii Bardyla, Alex Ravsky
doaj   +1 more source

Magnetic topological quantum chemistry [PDF]

open access: yesNature Communications, 2020
For over 100 years, the group-theoretic characterization of crystalline solids has provided the foundational language for diverse problems in physics and chemistry.
Benjamin J. Wieder   +6 more
semanticscholar   +1 more source

Door spaces on N-topology

open access: yesRatio Mathematica, 2023
In this article, we explore the idea of door space on -topological space. Here, we discuss which door spaces in this space are related with  submaximal. The equivalent conditions shows how it connects a -topological property. Also, we derive various door
Loyala Foresith Spencer J   +1 more
doaj   +1 more source

The character of free topological groups I

open access: yesApplied General Topology, 2005
A systematic analysis is made of the character of the free and free abelian topological groups on uniform spaces and on topological spaces. In the case of the free abelian topological group on a uniform space, expressions are given for the character in ...
Peter Nickolas, Mikhail Tkachenko
doaj   +1 more source

Nigh-Open Sets in Topological Space

open access: yesInternational Journal of Analysis and Applications, 2023
In this paper, we aim to introduce a new class of open sets namely nigh-open set. Accordingly, we define a topological space called a nigh-topological space. This consequently leads us to outline several new operations in connection with the sets in nigh-
Jamal Oudetallah   +2 more
doaj   +1 more source

Topological Insulators in Twisted Transition Metal Dichalcogenide Homobilayers. [PDF]

open access: yesPhysical Review Letters, 2018
We show that moiré bands of twisted homobilayers can be topologically nontrivial, and illustrate the tendency by studying valence band states in ±K valleys of twisted bilayer transition metal dichalcogenides, in particular, bilayer MoTe_{2}.
Fengcheng Wu   +5 more
semanticscholar   +1 more source

A Hybrid Approach to Micro Vague Topological Space via Neutrosophic Topological Space [PDF]

open access: yesNeutrosophic Sets and Systems
Plenty of topologists are exploring and discovering multiple forms of topological spaces. The chief objective of the current enquiry is to establish and evaluate an original hybrid topological space named Neutrosophic Micro Vague Topological Space. When
Vargees Vahini T, Trinita Pricilla
doaj   +1 more source

Topological Band Theory for Non-Hermitian Hamiltonians. [PDF]

open access: yesPhysical Review Letters, 2017
We develop the topological band theory for systems described by non-Hermitian Hamiltonians, whose energy spectra are generally complex. After generalizing the notion of gapped band structures to the non-Hermitian case, we classify "gapped" bands in one ...
Huitao Shen, B. Zhen, L. Fu
semanticscholar   +1 more source

Comprehensive search for topological materials using symmetry indicators [PDF]

open access: yesNature, 2018
Over the past decade, topological materials—in which the topology of electron bands in the bulk material leads to robust, unconventional surface states and electromagnetism—have attracted much attention.
F. Tang, H. Po, A. Vishwanath, X. Wan
semanticscholar   +1 more source

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