Results 71 to 80 of about 3,180,841 (100)

On the distance & distance (signless) Laplacian spectra of non-commuting graphs

open access: yes, 2022
Let $Z(G)$ be the centre of a finite non-abelian group $G.$ The non-commuting graph of $G$ is a simple undirected graph with vertex set $G\setminus Z(G),$ and two vertices $u$ and $v$ are adjacent if and only if $uv\ne vu.$ In this paper, we investigate ...
Paul, Somnath, Kalita, Jharna
core  

BOUNDS FOR SIGNLESS LAPLACIAN SPECTRAL RADIUS

open access: yes, 2018
We consider weighted graphs, such as graphs where the edge weights are positive definite matrices of the same order in this paper. The signless Laplacian eigenvalues of a graph are the eigenvalues of the signless Laplacian matrix of a graph G.
Nurkahli, Semiha Basdas   +2 more
core  

On the Signless Laplacian ABC-Spectral Properties of a Graph

open access: yes
In the paper, we introduce the signless Laplacian ABC-matrix Q̃(G)=D¯(G)+Ã(G), where D¯(G) is the diagonal matrix of ABC-degrees and Ã(G) is the ABC-matrix of G. The eigenvalues of the matrix Q̃(G) are the signless Laplacian ABC-eigenvalues of G.
Bilal A. Rather   +2 more
core   +1 more source

Bounds for the signless laplacian energy

open access: yes
The energy of a graph G is the sum of the absolute values of the eigenvalues of the adjacency matrix of G. The Laplacian (respectively, the signless Laplacian) energy of G is the sum of the absolute values of the differences between the eigenvalues of ...
Gutman, I.   +4 more
core  

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