Results 21 to 30 of about 67,630 (266)

On Laplacian eigenvalues of connected graphs [PDF]

open access: yesCzechoslovak Mathematical Journal, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Milovanović, Igor Ž.   +2 more
openaire   +2 more sources

Estimates for eigenvalues of weighted Laplacian and weighted $p$-Laplacian [PDF]

open access: yesHiroshima Mathematical Journal, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Du, Feng   +3 more
openaire   +2 more sources

Seidel Signless Laplacian Energy of Graphs [PDF]

open access: yesMathematics Interdisciplinary Research, 2017
Let S(G) be the Seidel matrix of a graph G of order n and let DS(G)=diag(n-1-2d1, n-1-2d2,..., n-1-2dn) be the diagonal matrix with d_i denoting the degree of a vertex v_i in G.
Harishchandra Ramane   +3 more
doaj   +1 more source

Normalized Laplacian spectrum of some subdivision-joins and -joins of two regular graphs

open access: yesAKCE International Journal of Graphs and Combinatorics, 2018
In this paper we determine the full normalized Laplacian spectrum of the subdivision-vertex join, subdivision-edge join, -vertex join, and -edge join of two regular graphs in terms of the normalized Laplacian eigenvalues of the graphs. Moreover, applying
Arpita Das, Pratima Panigrahi
doaj   +2 more sources

On the sum of signless Laplacian spectra of graphs

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2019
For a simple graph $G(V,E)$ with $n$ vertices, $m$ edges, vertex set $V(G)=\{v_1, v_2, \dots, v_n\}$ and edge set $E(G)=\{e_1, e_2,\dots, e_m\}$, the adjacency matrix $A=(a_{ij})$ of $G$ is a $(0, 1)$-square matrix of order $n$ whose $(i,j)$-entry is ...
S. Pirzada, H.A. Ganie, A.M. Alghamdi
doaj   +1 more source

(Generalized) Incidence and Laplacian-Like Energies

open access: yesJournal of Mathematics, 2023
In this study, for graph Γ with r connected components (also for connected nonbipartite and connected bipartite graphs) and a real number ε≠0,1, we found generalized and improved bounds for the sum of ε-th powers of Laplacian and signless Laplacian ...
A. Dilek Maden, Mohammad Tariq Rahim
doaj   +1 more source

Normalized Laplacian Spectrum of Some Q-Coronas of Two Regular Graphs

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2021
In this paper we determine the normalized Laplacian spectrum of the Q-vertex corona, Q-edge corona, Q-vertex neighborhood corona, and Q-edge neighborhood corona of a connected regular graph with an arbitrary regular graph in terms of normalized Laplacian
Das Arpita, Panigrahi Pratima
doaj   +1 more source

Homological eigenvalues of graph p-Laplacians

open access: yesJournal of Topology and Analysis, 2023
Inspired by persistent homology in topological data analysis, we introduce the homological eigenvalues of the graph [Formula: see text]-Laplacian [Formula: see text], which allows us to analyze and classify non-variational eigenvalues. We show the stability of homological eigenvalues, and we prove that for any homological eigenvalue [Formula: see text]
openaire   +2 more sources

Mixed eigenvalues of discrete p-Laplacian [PDF]

open access: yesFrontiers of Mathematics in China, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Mu-Fa, Wang, Lingdi, Zhang, Yuhui
openaire   +1 more source

Construction of L-equienergetic graphs using some graph operations

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
For a graph G with n vertices and m edges, the eigenvalues of its adjacency matrix A(G) are known as eigenvalues of G. The sum of absolute values of eigenvalues of G is called the energy of G.
S. K. Vaidya, Kalpesh M. Popat
doaj   +1 more source

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