Results 71 to 80 of about 486 (190)

Asymptotic profiles of eigenfunctions for some 1-dimensional linearized eigenvalue problems

open access: yesCommunications on Pure and Applied Analysis, 2010
We are interested in the asymptotic profiles of all eigenfunctions for 1-dimensional linearized eigenvalue problems to nonlinear boundary value problems with a diffusion coefficient $\varepsilon$. For instance, it seems that they have simple and beautiful properties for sufficiently small $\varepsilon$ in the balanced bistable nonlinearity case.
Tohru Wakasa, Shoji Yotsutani
openaire   +1 more source

Asymptotic analysis of the spectral Neumann problem in thick multi-structure of type 3:1:1

open access: yes, 2005
The spectral Neumann problem is considered in a thick multi-structure, which is the union of some three-dimensional domain (the junction’s body) and a large number of ε-periodically situated thin cylinders along some curve (the joint zone) on the ...
Mel'nyk, T.A.
core   +1 more source

On the solvability of the Sturm – Liouville problem, nonlinear in the spectral parameter

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки
Background. The paper studies the solvability of the Sturm-Liouville problem, which is nonlinear in the spectral parameter. The problem is studied on a segment with boundary conditions of the third kind. Materials and methods.
G.V. Chalyshov
doaj   +1 more source

Wave equation for Sturm-Liouville operator with singular potentials [PDF]

open access: yes, 2022
The paper is denoted to the initial-boundary value problem for the wave equation with the Sturm-Liouville operator with irregular (distributive) potentials.
Yeskermessuly, Alibek   +2 more
core  

Pathological exponential asymptotics for a model problem of an equatorially trapped Rossby wave

open access: yes, 2023
We examine a misleadingly simple linear second-order eigenvalue problem (the Hermite-with-pole equation) that was previously proposed as a model problem of an equatorially-trapped Rossby wave.
Trinh, Philippe H.   +2 more
core  

Eigenvalue asymptotics and exponential decay of eigenfunctions for Schrödinger operators with magnetic fields [PDF]

open access: yesTransactions of the American Mathematical Society, 1996
We consider the Schrödinger operator with magnetic field, H = ( 1
openaire   +2 more sources

Singular perturbations of curved boundaries in dimension three. The spectrum of the Neumann Laplacian

open access: yes, 2010
We calculate the main asymptotic terms for eigenvalues, both simple and multiple, and eigenfunctions of the Neumann Laplacian in a three-dimensional domain $\Om(h)$ perturbed by a small (with diameter $O(h)$) Lipschitz cavern $\overline{\om_h}$ in a ...
Sokolowski, Jan   +2 more
core   +1 more source

Essentially isospectral transformations and their applications

open access: yes, 2017
We define and study the properties of Darboux-type transformations between Sturm–Liouville problems with boundary conditions containing rational Herglotz–Nevanlinna functions of the eigenvalue parameter (including the Dirichlet boundary conditions ...
Namig J. Guliyev
core   +3 more sources

Sharp Behavior of Dirichlet–Laplacian Eigenvalues for a Class of Singularly Perturbed Problems [PDF]

open access: yes
We deepen the study of Dirichlet eigenvalues in bounded domains where a thin tube is attached to the boundary. As its section shrinks to a point, the problem is spectrally stable and we quantitatively investigate the rate of convergence of the perturbed ...
Ognibene, Roberto, Abatangelo, Laura
core   +1 more source

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