Results 21 to 30 of about 177,680 (311)

WEIGHTED LAPLACIANS OF GRIDS AND THEIR APPLICATION FOR INSPECTION OF SPECTRAL GRAPH CLUSTERING METHODS

open access: yesTASK Quarterly, 2021
This paper investigates the relationship between various types of spectral clustering methods and their kinship to relaxed versions of graph cut methods.
MIECZYSŁAW KŁOPOTEK   +2 more
doaj   +1 more source

A note on the eigensystem of the covariance matrix of dichotomous Guttman items

open access: yesFrontiers in Psychology, 2015
We consider the sample covariance matrix for dichotomous Guttman items under a set of uniformity conditions, and obtain closed-form expressions for the eigenvalues and eigenvectors of the matrix.
Clintin P Davis-Stober   +2 more
doaj   +1 more source

Exceptional Points in a Non-Markovian Anti-Parity-Time Symmetric System

open access: yesPhotonics, 2023
By studying the eigenvalues and eigenvectors of a non-Markovian anti parity-time (APT) symmetric system, we investigate the possibility of exceptional points (EPs) that may arise within it.
Andrew Wilkey   +2 more
doaj   +1 more source

On the asymptotics of a Robin eigenvalue problem [PDF]

open access: yes, 2013
The considered Robin problem can formally be seen as a small perturbation of a Dirichlet problem. However, due to the sign of the impedance value, its associated eigenvalues converge point-wise to $-\infty$ as the perturbation goes to zero. We prove that
Cakoni, Fioralba   +2 more
core   +6 more sources

Generalized Rayleigh methods with applications to finding eigenvalues of large matrices [PDF]

open access: yes, 1971
Generalized Rayleigh quotients for calculating eigenvalues and eigenvectors of large ...
Vandergraft, J. S.
core   +2 more sources

A teaching proposal for the study of Eigenvectors and Eigenvalues

open access: yesJournal of Technology and Science Education, 2017
In this work, we present a teaching proposal which emphasizes on visualization and physical applications in the study of eigenvectors and eigenvalues.
María José Beltrán Meneu   +2 more
doaj   +1 more source

Dependence of Supertropical Eigenspaces [PDF]

open access: yes, 2016
We study the pathology that causes tropical eigenspaces of distinct supertropical eigenvalues of a nonsingular matrix $A$, to be dependent. We show that in lower dimensions the eigenvectors of distinct eigenvalues are independent, as desired.
Niv, Adi, Rowen, Louis
core   +4 more sources

Mixed-Field Source Localization Based on the Non-Hermitian Matrix

open access: yesInformation, 2020
In this paper, an efficient high-order multiple signal classification (MUSIC)-like method is proposed for mixed-field source localization. Firstly, a non-Hermitian matrix is designed based on a high-order cumulant.
Minggang Mo, Zhaowei Sun
doaj   +1 more source

SPCA Assisted Correlation Clustering of Hyperspectral Imagery [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
In this study, correlation clustering is introduced to hyperspectral imagery for unsupervised classification. The main advantage of correlation clustering lies in its ability to simultaneously perform feature reduction and clustering. This algorithm also
A. Mehta, O. Dikshit
doaj   +1 more source

Recursive solutions for Laplacian spectra and eigenvectors of a class of growing treelike networks

open access: yes, 2009
The complete knowledge of Laplacian eigenvalues and eigenvectors of complex networks plays an outstanding role in understanding various dynamical processes running on them; however, determining analytically Laplacian eigenvalues and eigenvectors is a ...
B. Bollobás   +8 more
core   +1 more source

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