Results 11 to 20 of about 46 (45)

The Diagonalizable Nonnegative Inverse Eigenvalue Problem

Special 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.
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A pathological example in nonlinear spectral theory

Advances in Nonlinear Analysis, 2017
We construct an open set Ω⊂ℝN{\Omega\subset\mathbb{R}^{N}} on which an eigenvalue problem for the p-Laplacian has no isolated first eigenvalue and the spectrum is not discrete.
Brasco Lorenzo, Franzina Giovanni
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Principal spectral theory and asymptotic behavior of the spectral bound for partially degenerate nonlocal dispersal systems

Advanced Nonlinear Studies
The purpose of this paper is to investigate the principal spectral theory and asymptotic behavior of the spectral bound for cooperative nonlocal dispersal systems, specifically focusing on the case where partial diffusion coefficients are zero, referred ...
Zhang Lei
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Symmetrization for Mixed Operators

Annales Mathematicae Silesianae
In this paper, we prove Talenti's comparison theorem for mixed local/nonlocal elliptic operators and derive the Faber–Krahn inequality for the first eigenvalue of the Dirichlet mixed local/nonlocal problem. Our findings are relevant to the fractional p&q–
Bahrouni Sabri
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On the solvability of discrete nonlinear Neumann problems involving the p(x)-Laplacian

Advances in Difference Equations, 2011
In this article, we prove the existence and uniqueness of solutions for a family of discrete boundary value problems for data f which belongs to a discrete Hilbert space W. 2010 Mathematics Subject Classification: 47A75; 35B38; 35P30; 34L05; 34L30.
Ouaro Stanislas, Guiro Aboudramane, Nyanquini Ismael   +2 more
doaj  

The Generalized Newton Iteration for the Matrix Sign Function

, 1997
. In this paper we present modified algorithms for computing deflating subspaces of matrix pencils by means of the matrix sign function. Specifically, our new algorithms reduce the number of iterations to half, cut the cost of each Newton iteration by ...
Enrique S. Quintana-Orti, Xiaobai Sun, Enrique   +2 more
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Pseudospectra, The Harmonic Oscillator And Complex Resonances

, 1998
We prove that non-self-adjoint harmonic and anharmonic oscillator operators have non-trivial pseudospectra. As a consequence, the computation of high energy resonances by the dilation analyticity technique is not numerically stable.
E. B. Davies
core  

Pseudospectra Of Differential Operators

, 1997
We study the pseudospectral theory of a variety of non-self-adjoint constant coefficient and variable coefficient differential operators, showing that the phenomenon of non-trivial pseudospectra is typical rather than exceptional.
E. B. Davies
core  

Expansion of eigenvalues of the perturbed discrete bilaplacian. [PDF]

Mon Hefte Math, 2022
Kholmatov SY, Khalkhuzhaev A, Pardabaev M.   +2 more
europepmc   +1 more source

Efficient numerical computation of the basic reproduction number for structured populations. [PDF]

J Comput Appl Math, 2021
Breda D, Florian F, Ripoll J, Vermiglio R.   +3 more
europepmc   +1 more source