Results 11 to 20 of about 350,941 (326)

Computational analysis of metal organic framework and covalent organic framework using degree based topological indices with QSPR validation. [PDF]

Sci Rep
Tu Y, Yousaf S, Tariq S, Tawfiq FM, Aslam A, Tola KA.   +5 more
europepmc   +3 more sources

Ambrosetti-Prodi-type results for a class of difference equations with nonlinearities indefinite in sign

Open Mathematics, 2022
In this article, we are concerned with the periodic solutions of first-order difference equation Δu(t−1)=f(t,u(t))−s,t∈Z,(P)\Delta u\left(t-1)=f\left(t,u\left(t))-s,\hspace{1em}t\in {\mathbb{Z}},\hspace{1.0em}\hspace{1.0em}\left(P) where s∈Rs\in {\mathbb{
Zhao Jiao, Ma Ruyun
doaj   +1 more source

Existence result for a nonlinear elliptic problem by topological degree in Sobolev spaces with variable exponent

Moroccan Journal of Pure and Applied Analysis, 2021
The aim of this paper is to establish the existence of solutions for a nonlinear elliptic problem of the ...
Ait Hammou Mustapha, Azroul Elhoussine
doaj   +1 more source

Novel Degree-Based Topological Descriptors of Fenofibrate Using M-Polynomial

Journal of Mathematics, 2023
Chemical graph theory is currently expanding the use of topological indices to numerically encode chemical structure. The prediction of the characteristics provided by the chemical structure of the molecule is a key feature of these topological indices ...
Muhammad Kamran, Muhammad Farman, Seyma Ozon Yildirim, Sadik Delen, Ismail Naci Cangul, Maria Akram, M. K. Pandit   +6 more
doaj   +1 more source

Solvability for a fractional p-Laplacian equation in a bounded domain

AIMS Mathematics, 2022
In this paper we use the topological degree and the fountain theorem to study the existence of weak solutions for a fractional p-Laplacian equation in a bounded domain.
Zhiwei Lv, Jiafa Xu , Donal O'Regan
doaj   +1 more source

On degree–based topological indices of random polyomino chains

Mathematical Biosciences and Engineering, 2022
In this article, we study the degree-based topological indices in a random polyomino chain. The key purpose of this manuscript is to obtain the asymptotic distribution, expected value and variance for the degree-based topological indices in a random ...
Saylé C. Sigarreta , Saylí M. Sigarreta , Hugo Cruz-Suárez   +2 more
doaj   +1 more source

Helical Topological Edge States in a Quadrupole Phase [PDF]

, 2018
Topological electric quadrupole is a recently proposed concept that extends the theory of electric polarization of crystals to higher orders. Such a quadrupole phase supports topological states localized on both edges and corners.
Deng, Hai-Yao, Liu, Feng, Wakabayashi, Katsunori   +2 more
core   +3 more sources

Extremal topological indices of some nanostructures

Heliyon, 2023
In this work, general formulas of degree-based and neighborhood degree sum-based topological indices for a 2D lattice of H-Naphtalenic nanotubes and pent-heptagonal nanosheets are determined.
Shivani Rai, Biswajit Deb, Zahid Raza, Sourav Mondal   +3 more
doaj   +1 more source

Dirac Monopole and Spin Hall Conductance for Anisotropic Superconductivities [PDF]

, 2003
Concept of the topological order is useful to characterize anisotropic superconductivities. The spin Hall conductance distinguishes superconductivities with the same symmetry. The Chern number for the spin Hall conductance is given by the covering degree
Berry, Hatsugai, Hatsugai, Kohmoto, Laughlin, Morita, Senthil, Shinsei Ryu, Thouless, Volovik, Wen, Wu, Yasuhiro Hatsugai   +12 more
core   +2 more sources

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

, 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