Results 41 to 50 of about 9,155,817 (192)

Infinitely many solutions for Schrödinger–Kirchhoff-type equations involving indefinite potential

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2017
In this paper, we study the multiplicity of solutions for the following Schrödinger–Kirchhoff-type equation \[ \begin{cases}-\left(a+b\int_{\mathbb{R}^N}|\nabla u|^2dx\right)\triangle u+V(x)u=f(x,u)+g(x,u), \quad x\in \mathbb{R}^N,\\ u\in H^1(\mathbb{R}^
Qingye Zhang, Bin Xu
doaj   +1 more source

Positive solutions for Neumann problems with indefinite and unbounded potential

open access: yesApplied Mathematics Letters, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nikolaos S. Papageorgiou   +1 more
openaire   +3 more sources

Resonant Robin problems driven by the ▫$p$▫-Laplacian plus an indefinite potential [PDF]

open access: yes, 2018
We consider a nonlinear Robin problems driven by the ▫$p$▫-Laplacian plus an indefinite potential. The reaction is resonant with respect to a variational eigenvalue. For the principal eigenvalue we assume strong resonance.
Rǎdulescu, Vicenţiu   +7 more
core   +1 more source

Children’s knowledge of indefinite and definite reference [PDF]

open access: yes, 1990
After reviewing previous theoretical and empirical investigations, the decision is made that an understanding of both "Familiarity' and 'Specificity' must be necessary for a full appreciation of indefiniteness/definiteness.
Sims, K.M   +2 more
core  

Focus structure and the referential status of indefinite quantificational expressions [PDF]

open access: yes, 2013
Many authors who subscribe to some version of generative syntax account for the two readings of [...] sentences [...] in terms of LF-ambiguity. There is assumed to be covert quantifier raising (QR), which results in two distinct possibilities for the ...
Breul, Carsten
core  

Nontrivial Solutions for 4-Superlinear Schrödinger–Kirchhoff Equations with Indefinite Potentials

open access: yesJournal of Function Spaces, 2021
This paper is devoted to the 4-superlinear Schrödinger–Kirchhoff equation −a+b∫ℝ3∇u2dxΔu+Vxu=fx,u,in ℝ3, where a>0, b≥0. The potential V here is indefinite so that the Schrödinger operator −Δ+V possesses a finite-dimensional negative space.
Wei Chen, Yue Wu
doaj   +1 more source

Superlinear perturbations of the eigenvalue problem for the Robin Laplacian plus an indefinite and unbounded potential [PDF]

open access: yes, 2020
We consider a superlinear perturbation of the eigenvalue problem for the Robin Laplacian plus an indefinite and unbounded potential. Using variational tools and critical groups, we show that when ▫$lambda$▫ is close to a nonprincipal eigenvalue, then the
Rǎdulescu, Vicenţiu   +2 more
core   +1 more source

Principal eigenvalue in an unbounded domain with indefinite potential [PDF]

open access: yesNonlinear Differential Equations and Applications NoDEA, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Leadi, Liamidi, Yechoui, Akila
openaire   +2 more sources

Semilinear Robin problems driven by the Laplacian plus an indefinite potential [PDF]

open access: yes, 2020
We study a semilinear Robin problem driven by the Laplacian plus an indefinite potential. We consider the case where the reaction term f is a Carathéodory function exhibiting linear growth near ±∞.
Vetro C.
core   +1 more source

Solutions for the Problems Involving Fractional Laplacian and Indefinite Potentials

open access: yesAdvanced Nonlinear Studies, 2017
Abstract In this paper, we consider a class of Schrödinger equations involving fractional Laplacian and indefinite potentials. By modifying the definition of the Nehari–Pankov manifold, we prove the existence and asymptotic behavior of least energy solutions.
Tang Zhongwei, Wang Lushun
openaire   +3 more sources

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