Results 81 to 90 of about 120,979 (218)

Ubiquity of synonymity: almost all large binary trees are not uniquely identified by their spectra or their immanantal polynomials

open access: yes, 2006
There are several common ways to encode a tree as a matrix, such as the adjacency matrix, the Laplacian matrix (that is, the infinitesimal generator of the natural random walk), and the matrix of pairwise distances between leaves.
Evans, Steven N., Matsen, Frederick A.
core   +3 more sources

On the Seidel Laplacian spectrum of threshold graphs [PDF]

open access: yesJournal of Hyperstructures
A graph which does not contain C4, P4, or 2K2 as its induced subgraphs, is called a threshold graph. In this paper, we consider seidel laplacian matrix of a connected threshold graph and determine the seidel laplacian spectrum. Also, the characterization
Megha P M, Parvathy K S
doaj   +1 more source

The adjacency matrix and the discrete Laplacian acting on forms

open access: yes, 2015
We study the relationship between the adjacency matrix and the discrete Laplacian acting on 1-forms. We also prove that if the adjacency matrix is bounded from below it is not necessarily essentially self-adjoint.
Baloudi, Hatem   +2 more
core  

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

Fractional Laplacian matrix on the finite periodic linear chain and its periodic Riesz fractional derivative continuum limit

open access: yes, 2014
The 1D discrete fractional Laplacian operator on a cyclically closed (periodic) linear chain with finitenumber $N$ of identical particles is introduced. We suggest a "fractional elastic harmonic potential", and obtain the $N$-periodic fractionalLaplacian
Collet, Bernard   +3 more
core  

Oversampled Graph Laplacian Matrix For Graph Signals

open access: yes, 2014
Publication in the conference proceedings of EUSIPCO, Lisbon, Portugal ...
Sakiyama, Akie, Tanaka, Yuichi
openaire   +1 more source

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