Results 21 to 30 of about 351,014 (282)

Degree-based topological indices of boron nanotubes

open access: yesAIP Advances, 2023
In the past two decades, boron nanotubes have received significant attention from researchers and scientists due to their wide-ranging applications in electronics, nanodevices, optical engineering, nanobiotechnology, and cosmetics.
Sohan Lal, Shriya Negi, Vijay Kumar Bhat
doaj   +1 more source

Sine-Gordon solitons, auxiliary fields, and singular limit of a double pendulums chain [PDF]

open access: yes, 2007
We consider the continuum version of an elastic chain supporting topological and non-topological degrees of freedom; this generalizes a model for the dynamics of DNA recently proposed and investigated by ourselves. In a certain limit, the non-topological
Cadoni M   +12 more
core   +1 more source

On \(ev\)-degree and \(ve\)-degree topological indices

open access: yes, 2017
Summary: Recently, two new degree concepts have been defined in graph theory: \(ev\)-degree and \(ve\)-degree. Also the \(ev\)-degree and \(ve\)-degree Zagreb and Randić indices have been defined very recently as parallel of the classical definitions of Zagreb and Randić indices. It was shown that \(ev\)-degree and \(ve\)-degree topological indices can
Şahin, Bünyamin, Ediz, Süleyman
openaire   +3 more sources

Convergence Classes of L-Filters in L,M-Fuzzy Topological Spaces

open access: yesJournal of Mathematics, 2021
An L,M-fuzzy topological convergence structure on a set X is a mapping which defines a degree in M for any L-filter (of crisp degree) on X to be convergent to a molecule in LX.
Ting Yang   +4 more
doaj   +1 more source

Topological Study of Zeolite Socony Mobil-5 via Degree-Based Topological Indices

open access: yesJournal of Chemistry, 2021
Graph theory is a subdivision of discrete mathematics. In graph theory, a graph is made up of vertices connected through edges. Topological indices are numerical parameters or descriptors of graph.
Nouman Saeed   +4 more
doaj   +1 more source

Interplay of topology and quantization: topological energy quantization in a cavity [PDF]

open access: yes, 2002
The interplay between quantization and topology is investigated in the frame of a topological model of electromagnetism proposed by the author. In that model, the energy of monochromatic electromagnetic radiation in a cubic cavity is $E=(d/4)\hbar \omega$
Ranada, Antonio F.
core   +4 more sources

Degree-Based Topological Indices

open access: yesCroatica Chemica Acta, 2013
The degree of a vertex of a molecular graph is the number of first neighbors of this vertex. A large number of molecular-graph-based structure descriptors (topological indices) have been conceived, depending on vertex degrees. We summarize their main properties, and provide a critical comparative study thereof.
openaire   +4 more sources

Topological Degree via a Degree of Nondensifiability and Applications

open access: yesAxioms
The goal of this work is to introduce the notion of topological degree via the principle of the degree of nondensifiability (DND for short). We establish some new fixed point theorems, concerning, Schaefer’s fixed point theorem and the nonlinear ...
Noureddine Ouahab   +2 more
doaj   +1 more source

Degree and Neighborhood Degree Sum-based Topological Characteristics of Zosurabalpin: a Novel Drug for Managing Antibiotic-resistant Infection

open access: yesScientific Annals of Computer Science
This article is concerned with the topological characterization of the antibiotic Zosurabalpin through the computation of degree and associated neighborhood degree sum-based topological indices.
Shibsankar Das   +4 more
doaj   +1 more source

Topological Descriptors on Some Families of Graphs

open access: yesJournal of Chemistry, 2021
In view of the successful applications of graph theory, relationships between the biological activity and chemical structure have been developed. One of the popular topics in graph theory is problems relating to topological indices.
Iftikhar Ahmad   +3 more
doaj   +1 more source

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