Results 21 to 30 of about 2,858,268 (305)
Spectral characterizations of sun graphs and broken sun graphs [PDF]
Discrete Mathematics & Theoretical Computer Science, 2009 Several matrices can be associated to a graph such as the adjacency matrix or the Laplacian matrix. The spectrum of these matrices gives some informations about the structure of the graph and the question ''Which graphs are determined by their spectrum?''
Romain Boulet
doaj +1 more source
The non-negative spectrum of a digraph
Open Mathematics, 2020 Given the adjacency matrix A of a digraph, the eigenvalues of the matrix AAT constitute the so-called non-negative spectrum of this digraph. We investigate the relation between the structure of digraphs and their non-negative spectra and associated ...
Alomari Omar +2 more
doaj +1 more source
Cospectral constructions for several graph matrices using cousin vertices
Special Matrices, 2021 Graphs can be associated with a matrix according to some rule and we can find the spectrum of a graph with respect to that matrix. Two graphs are cospectral if they have the same spectrum.
Lorenzen Kate
doaj +1 more source
Computing the Energy and Estrada Index of Different Molecular Structures
Journal of Chemistry, 2022 Graph energy is an invariant that is derived from the spectrum of the adjacency matrix of a graph. Graph energy is actually the absolute sum of all the eigenvalues of the adjacency matrix of a graph i.e.
Zeeshan Saleem Mufti +5 more
doaj +1 more source
Remote Sensing, 2022 Atmospheric correction of satellite optical imagery over inland waters is a key remaining challenge in aquatic remote sensing. This is due to numerous confounding factors such as the complexity of water optical properties, the surface glint, the ...
Yanqun Pan, S. Bélanger, Y. Huot
semanticscholar +1 more source
A new matrix representation of multidigraphs
AKCE International Journal of Graphs and Combinatorics, 2020 In this article, we introduce a new matrix associated with a multidigraph, named as the complex adjacency matrix. We study the spectral properties of bipartite multidigraphs corresponding to the complex adjacency matrix.
Sasmita Barik, Gopinath Sahoo
doaj +1 more source
The H-join of arbitrary families of graphs - the universal adjacency spectrum
Linear Algebra and its Applications, 2022 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Domingos M. Cardoso +2 more
openaire +3 more sources
The spectral determination of the connected multicone graphs
AKCE International Journal of Graphs and Combinatorics, 2021 The main goal of the paper is to answer an unsolved problem. A multicone graph is defined to be the join of a clique and a regular graph, and a wheel as the join of a vertex and a cycle.
Ali Zeydi Abdian +4 more
doaj +1 more source
Groups all of whose undirected Cayley graphs are integral [PDF]
, 2014 Let $G$ be a finite group, $S\subseteq G\setminus\{1\}$ be a set such that if $a\in S$, then $a^{-1}\in S$, where $1$ denotes the identity element of $G$. The undirected Cayley graph $Cay(G,S)$ of $G$ over the set $S$ is the graph whose vertex set is $G$
Abdollahi, Alireza, Jazaeri, Mojtaba
core +1 more source
Adjacent Channel Coexistence of LTE in Unlicensed Spectrum
The Journal of Korean Institute of Communications and Information Sciences, 2015 This paper evaluates the adjacent channel coexistence issues between LAA(License Assisted Access) system and other system (e.g. Wi-Fi) system in 5 GHz unlicensed spectrum. LAA is a technology to achieve enhanced data rate by aggregating licensed and unlicensed spectrum using CA(Carrier Aggregation).
Su Hwan Lim +2 more
openaire +2 more sources