Results 31 to 40 of about 198,875 (210)

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

Star Algebra Spectroscopy [PDF]

open access: yes, 2001
The spectrum of the infinite dimensional Neumann matrices M^{11}, M^{12} and M^{21} in the oscillator construction of the three-string vertex determines key properties of the star product and of wedge and sliver states.
Ashoke Sen   +21 more
core   +2 more sources

A diffusive matrix model for invariant $\beta$-ensembles [PDF]

open access: yes, 2012
We define a new diffusive matrix model converging towards the $\beta$-Dyson Brownian motion for all $\beta\in [0,2]$ that provides an explicit construction of $\beta$-ensembles of random matrices that is invariant under the orthogonal/unitary group.
Allez, Romain, Guionnet, Alice
core   +2 more sources

On Eigenvalues and Eigenvectors of Perturbed Pairwise Comparison Matrices

open access: yesJournal of Mathematical and Fundamental Sciences, 2013
This work studied eigenvalues and eigenvectors of a class of perturbed pairwise comparison matrices (PCMs). This type of matrices arises from Analytical Hierarchical Process with inconsistency comparison. By employing some nice structures of the PCMs, we
Pudji Astuti, Agah D. Garnadi
doaj   +1 more source

A graph discretization of the Laplace-Beltrami operator [PDF]

open access: yes, 2014
We show that eigenvalues and eigenfunctions of the Laplace-Beltrami operator on a Riemannian manifold are approximated by eigenvalues and eigenvectors of a (suitably weighted) graph Laplace operator of a proximity graph on an epsilon-net.Comment: 29 ...
Burago, Dmitri   +2 more
core   +3 more sources

Topology optimization of eigenvalues for elastic structures by topological derivatives and time domain response

open access: yesMechanical Engineering Journal
This paper derives the topological derivative of structural eigenvalues based on the partial differential equations of time-harmonic elastodynamics and their weak form, with the goal of achieving topology optimization of structural eigenvalues.
Hao REN   +3 more
doaj   +1 more source

Approximation of eigenvalues of some unbounded self-adjoint discrete Jacobi matrices by eigenvalues of finite submatrices [PDF]

open access: yesOpuscula Mathematica, 2007
We investigate the problem of approximation of eigenvalues of some self-adjoint operator in the Hilbert space \(l^2(\mathbb{N})\) by eigenvalues of suitably chosen principal finite submatrices of an infinite Jacobi matrix that defines the operator ...
Maria Malejki
doaj  

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

Differentiable roots, eigenvalues, and eigenvectors

open access: yes, 2013
We determine the conditions for the existence of $C^p$-roots of curves of monic complex polynomials as well as for the existence of $C^p$-eigenvalues and $C^p$-eigenvectors of curves of normal complex matrices.Comment: 18 pages, some typos corrected ...
Rainer, Armin
core   +1 more source

Home - About - Disclaimer - Privacy