Results 21 to 30 of about 3,505,030 (302)

A global bifurcation result of a Neumann problem with indefinite weight

Electronic Journal of Qualitative Theory of Differential Equations, 2004
This paper is concerned with the bifurcation result of nonlinear Neumann problem \begin{equation} \left\{\begin{array}{lll} -\Delta_p u=& \lambda m(x)|u|^{p-2}u + f(\lambda,x,u)& \mbox{in} \ \Omega\\ \frac{\partial u}{\partial \nu}\hspace{0.55cm}= & 0 &
Abdelouahed El Khalil, M. Ouanan
doaj   +3 more sources

Three weak solutions for degenerate weighted quasilinear elliptic equations with indefinite weights and variable exponents

AIMS Mathematics
This paper explores the multiplicity of weak solutions to a class of weighted elliptic problems with variable exponents, incorporating a Hardy term and a nonlinear indefinite source term.
Khaled Kefi, Nasser S. Albalawi
doaj   +2 more sources

Bifurcation of positive and negative solutions of nonlinearizable Sturm-Liouville problems with indefinite weight [PDF]

, 2020
We consider nonlinearizable Sturm-Liouville problem indefinite weight function. We show the existence of two pairs of global continua emanating from the bifurcation intervals surrounding the principal eigenvalues of the corresponding linear problem and ...
Ziyatkhan S. Aliyev, Leyla Nasirova
openalex   +2 more sources

Periodic Solutions of a Singular Equation With Indefinite Weight

Advanced Nonlinear Studies, 2010
AbstractMotivated by some relevant physical applications, we study the existence and uniqueness of T-periodic solutions for a second order differential equation with a piecewise constant singularity which changes sign. Other questions like the stability and robustness of the periodic solution are considered.
José Luis Bravo, Pedro J. Torres
openalex   +3 more sources

Non-real eigenvalues of symmetric Sturm–Liouville problems with indefinite weight functions

Electronic Journal of Qualitative Theory of Differential Equations, 2017
The present paper deals with non-real eigenvalues of regular Sturm–Liouville problems with odd symmetry indefinite weight functions applying the two-parameter method.
Bing Xie, huaqing Sun, Xinwei Guo
doaj   +2 more sources

A spectral problem with an indefinite weight for an elliptic system

Electronic Journal of Differential Equations, 1997
We establish the completeness and the summability in the sense of Abel-Lidskij of the root vectors of a non-selfadjoint elliptic problem with an indefinite weight matrix and the angular distribution of its eigenvalues.
Mamadou Sango
doaj   +2 more sources

Non‐autonomous double phase eigenvalue problems with indefinite weight and lack of compactness [PDF]

Bulletin of the London Mathematical Society, 2023
In this paper, we consider eigenvalues to the following double phase problem with unbalanced growth and indefinite weight, −Δpau−Δqu=λm(x)|u|q−2uinRN,$$\begin{equation*} \hspace*{3pc}-\Delta _p^a u-\Delta _q u =\lambda m(x)|u|^{q-2}u \quad \mbox{in} \,\,
Tian-Xiang Gou, V. Rǎdulescu
semanticscholar   +1 more source

Body donor programs in Australia and New Zealand: Current status and future opportunities. [PDF]

Anat Sci Educ
Abstract Body donation is critical to anatomy study in Australia and New Zealand. Annually, more than 10,000 students, anatomists, researchers, and clinicians access tissue donated by local consented donors through university‐based body donation programs. However, little research has been published about their operations.
Jenkin RA, Keay KA.
europepmc   +2 more sources

Nonlocal eigenvalue problems with indefinite weight [PDF]

Methods of Functional Analysis and Topology, 2020
In the present paper, we consider a class of eigenvalue problems driven by a nonlocal integro-di erential operator \scrL K with Dirichlet boundary conditions.
Said Taarabti
openaire   +3 more sources

Eigenvalue problems for the p-Laplacian with indefinite weights

Electronic Journal of Differential Equations, 2001
We consider the eigenvalue problem $-Delta_p u=lambda V(x) |u|^{p-2} u, uin W_0^{1,p} (Omega)$ where $p>1$, $Delta_p$ is the p-Laplacian operator, $lambda >0$, $Omega$ is a bounded domain in $mathbb{R}^N$ and $V$ is a given function in $L^s (Omega)$ ($s$
Mabel Cuesta
doaj   +2 more sources