Results 11 to 20 of about 3,569,907 (305)
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
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Three positive solutions of $N$-dimensional $p$-Laplacian with indefinite weight
Electronic Journal of Qualitative Theory of Differential Equations, 2019 This paper is concerned with the global behavior of components of positive radial solutions for the quasilinear elliptic problem with indefinite weight \begin{equation*} \begin{aligned} &\text{div}(\varphi_p(\nabla u))+\lambda h(x)f(u)=0, & & \text{in ...
Tianlan Chen, Ruyun Ma
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Nonlinear concave-convex problems with indefinite weight
Complex Variables and Elliptic Equations, 2021 We consider a parametric nonlinear Robin problem driven by the p-Laplacian and with a reaction having the competing effects of two terms. One is a parametric -sublinear term (concave nonlinearity) and the other is a -superlinear term (convex nonlinearity)
N. Papageorgiou, C. Vetro, F. Vetro
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On positive solutions of second-order delayed differential system with indefinite weight
Boundary Value Problems, 2021 In this paper, we study the existence of positive solutions of a second-order delayed differential system, in which the weight functions may change sign. To prove our main results, we apply Krasnosel’skii’s fixed point theorems in cones.
Fanglei Wang, Ran Ding
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Spectral properties of singular Sturm-Liouville operators with indefinite weight sgn x [PDF]
, 2007 We consider a singular Sturm-Liouville expression with the indefinite weight sgn x. To this expression there is naturally a self-adjoint operator in some Krein space associated.
Karabash, I., Trunk, C.
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Bifurcation from zero or infinity in nonlinearizable Sturm–Liouville problems with indefinite weight
Electronic Journal of Qualitative Theory of Differential Equations, 2021 In this paper, we consider bifurcation from zero or infinity of nontrivial solutions of the nonlinear Sturm–Liouville problem with indefinite weight. This problem is mainly important because of it is related with a selection-migration model in genetic ...
Ziyatkhan Aliyev, Leyla Nasirova
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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
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AIMS MathematicsExistence and multiplicity of three weak solutions for a Leray-Lions $ p(x) $-biharmonic problem involving Hardy potential and indefinite weight were proved. Our main tools combined variational methods and some critical theorems.
K. Kefi , Jian Liu
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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
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On the existence of positive solutions for an ecological model with indefinite weight
Arab Journal of Mathematical Sciences, 2016 This study concerns the existence of positive solutions for the following nonlinear boundary value problem: {−Δu=am(x)u−bu2−cupup+1−Kin Ω,u=0on ∂Ω, where Δu=div(∇u) is the Laplacian of u, while a,b,c,p,K are positive constants with p≥2 and Ω is a ...
Saleh Shakeri +2 more
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