Results 101 to 110 of about 13,572 (222)

Laplacian matrix and distance in trees

open access: yesKragujevac journal of mathematics, 2004
Laplacian matrix and distance in trees.
Vukičević, Damir, Gutman, Ivan
openaire   +1 more source

On spectrum and energies of enhanced power graphs

open access: yesMathematics Open
The enhanced power graph [Formula: see text] of a group G is a simple graph with vertex set G and two distinct vertex are adjacent if and only if they belong to the same cyclic subgroup.
Pankaj Kalita, Prohelika Das
doaj   +1 more source

Partitions of networks that are robust to vertex permutation dynamics

open access: yesSpecial Matrices, 2015
Minimum disconnecting cuts of connected graphs provide fundamental information about the connectivity structure of the graph. Spectral methods are well-known as stable and efficient means of finding good solutions to the balanced minimum cut problem.
Froyland Gary, Kwok Eric
doaj   +1 more source

Sparse Matrix Factorizations for Fast Linear Solvers with Application to Laplacian Systems [PDF]

open access: green, 2017
Michael T. Schaub   +3 more
openalex   +1 more source

Multi-label feature selection based on dynamic graph Laplacian

open access: yesTongxin xuebao, 2020
In view of the problems that graph-based multi-label feature selection methods ignore the dynamic change of graph Laplacian matrix, as well as such methods employ logical-value labels to guide feature selection process and loses label information, a ...
Yonghao LI   +3 more
doaj   +2 more sources

The nullity of the net Laplacian matrix of a signed graph

open access: yesAmerican Journal of Combinatorics
The net Laplacian matrix of a signed graph \(\Gamma = (G, \sigma)\), where \(G = (V(G),E(G))\) is an unsigned graph (referred to as the underlying graph) and \(\sigma: E(G) \rightarrow \{-1, +1\}\) is the sign function, is defined as \(L^{\pm}(\Gamma) = D^{\pm}(\Gamma) - A(\Gamma)\).
openaire   +3 more sources

On the neighbourhood degree sum-based Laplacian energy of graphs

open access: yesKuwait Journal of Science
A useful extension of the Laplacian matrix is proposed here and the corresponding modification of the Laplacian energy (LE) is presented. The neighbourhood degree sum-based Laplacian energy (LNE) is produced by means of the eigenvalues of the newly ...
doaj   +1 more source

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