Results 101 to 110 of about 1,624,240 (288)

Permanent of the Laplacian matrix of trees and bipartite graphs

open access: yesDiscrete Mathematics, 1984
Let \(G=(V,E)\) be a graph without loops and multiple edges with vertex set \(V=\{v_ 1,...,v_ n\}\) and edge set E. Suppose the degree of vertex \(v_ i\) equals \(d_ i\) for \(i=1,...,n\) and let \(D=D(G)\) be the diagonal matrix whose (i,i)-entry is \(d_ i\).
Richard A. Brualdi, John L. Goldwasser
openaire   +1 more source

JLMC: A clustering method based on Jordan-Form of Laplacian-Matrix

open access: yes, 2014
Among the current clustering algorithms of complex networks, Laplacian-based spectral clustering algorithms have the advantage of rigorous mathematical basis and high accuracy.
J Niu (13383387)   +2 more
core  

A two‐stage model for precise identification and Gleason grading of clinically significant prostate cancer: a hybrid approach

open access: yesJournal of Medical Radiation Sciences, Volume 72, Issue 1, Page 93-105, March 2025.
This study developed a two‐stage model using radiomics‐based multiparametric MRI and clinical indicators to help identify and grade clinically significant prostate cancer. The model showed promising levels of diagnostic accuracy and predictive performance.
Yuyan Zou   +10 more
wiley   +1 more source

The Laplacian matrix of a graph [PDF]

open access: yes, 1995
This paper is a study of the various matrices associated with graphs. In Chapter 1, the relationship between the Laplacian matrix and the Incidence matrix is explored. The Matrix-Tree Theorem (MTT) is stated here. One of the main objectives of this paper
Amar, Alka
core  

Distance matrix and Laplacian of a tree with attached graphs [PDF]

open access: yes, 2004
A tree with attached graphs is a tree, together with graphs defined on its partite sets. We introduce the notion of incidence matrix, Laplacian and distance matrix for a tree with attached graphs.
R.B. Bapat, Bapat, R. B., Bapat, R.B.
core   +1 more source

Kernel Bounds for Parabolic Operators Having First‐Order Degeneracy at the Boundary

open access: yesMathematische Nachrichten, EarlyView.
ABSTRACT We study kernel estimates for parabolic problems governed by singular elliptic operators ∑i,j=1N+1qijDij+cDyy,cγ+1>0,γ=qN+1,N+1,$$\begin{equation*} \sum _{i,j=1}^{N+1}q_{ij}D_{ij}+c\frac{D_y}{y},\qquad \frac{c}{\gamma }+1>0, \quad \gamma =q_{N+1,N+1}, \end{equation*}$$in the half‐space R+N+1={(x,y):x∈RN,y>0}$\mathbb {R}^{N+1}_+=\lbrace (x,y ...
L. Negro, C. Spina
wiley   +1 more source

On some properties of the Laplacian matrix revealed by the RCM algorithm [PDF]

open access: yes, 2016
summary:In this paper we present some theoretical results about the irreducibility of the Laplacian matrix ordered by the Reverse Cuthill-McKee (RCM) algorithm. We consider undirected graphs with no loops consisting of some connected components. RCM is a
Palomares Chust, Alberto   +7 more
core   +1 more source

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