Results 21 to 30 of about 418,858 (273)

STUDY OF THE EIGENVALUE SPECTRA OF THE NEUTRON TRANSPORT PROBLEM IN PN APPROXIMATION [PDF]

open access: yesEPJ Web of Conferences, 2021
The study of the steady-state solutions of neutron transport equation requires the introduction of appropriate eigenvalues: this can be done in various different ways by changing each of the operators in the transport equation; such modifications can be ...
Saracco P.   +4 more
doaj   +1 more source

A nonlocal eigenvalue problem and the stability of spikes for reaction-diffusion systems with fractional reaction rates [PDF]

open access: yes, 2003
We consider a nonlocal eigenvalue problem which arises in the study of stability of spike solutions for reaction-diffusion systems with fractional reaction rates such as the Sel'kov model, the Gray-Scott system, the hypercycle Eigen and Schuster ...
Dancer E. N.   +11 more
core   +1 more source

On optimum design of a vibrating plate with respect to its thickness and eigen-frequencies

open access: yesComputer Assisted Methods in Engineering and Science, 2023
The eigenvalue optimization problem for anisotropic plates has been dealt with. The variable thickness of a plate plays the role of a design variable. The state problem arises considering free vibrations of a plate.
Igor Bock, Ján Lovíšek
doaj  

Optimal Controller and Filter Realisations using Finite-precision, Floating- point Arithmetic. [PDF]

open access: yes, 2005
The problem of reducing the fragility of digital controllers and filters implemented using finite-precision, floating-point arithmetic is considered.
Chen, Sheng   +3 more
core   +1 more source

On thickness optimization of an unilaterally supported anisotropic plate subjected to buckling

open access: yesComputer Assisted Methods in Engineering and Science, 2023
We shall be dealing with the eigenvalue optimization problem for an anisotropic plate. The plate is partly unilaterally supported on its boundary and subjected to longitudinal forces causing its buckling.
Igor Bock, Jan Lovisek
doaj  

An Eigenvalue Problem for Nonlocal Equations

open access: yesBruno Pini Mathematical Analysis Seminar, 2016
In this paper we study the existence of a positive weak solution for a class of nonlocal equations under Dirichlet boundary conditions and involving the regional fractional Laplacian operator...Our result extends to the fractional setting some theorems ...
Giovanni Molica Bisci   +1 more
doaj   +1 more source

The Anderson model of localization: a challenge for modern eigenvalue methods [PDF]

open access: yes, 1997
We present a comparative study of the application of modern eigenvalue algorithms to an eigenvalue problem arising in quantum physics, namely, the computation of a few interior eigenvalues and their associated eigenvectors for the large, sparse, real ...
Elsner, U.   +4 more
core   +4 more sources

The Diagonalizable Nonnegative Inverse Eigenvalue Problem

open access: yesSpecial Matrices, 2018
In this articlewe provide some lists of real numberswhich can be realized as the spectra of nonnegative diagonalizable matrices but which are not the spectra of nonnegative symmetric matrices.
Cronin Anthony G, Laffey Thomas J.
doaj   +1 more source

HUBO formulations for solving the eigenvalue problem

open access: yesResults in Control and Optimization, 2023
Solving the eigenvalue problem is particularly important in almost all fields of science and engineering. With the development of quantum computers, multiple algorithms have been proposed for this purpose.
Kyungtaek Jun, Hyunju Lee
doaj   +1 more source

Approximation of the Minimal Eigenvalue for a Nonlinear Sturm–Liouville Problem [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2015
Properties of the minimal eigenvalue corresponding to the positive eigenfunction of a nonlinear eigenvalue problem for an ordinary differential equation are studied. This problem is approximated by a mesh scheme of the finite element method. The error of
V.S. Zheltukhin   +2 more
doaj  

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