Results 21 to 30 of about 13,629,063 (179)

Multiple positive solutions for a logarithmic Schrödinger–Poisson system with singular nonelinearity

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
In this article, we devote ourselves to investigate the following logarithmic Schrödinger–Poisson systems with singular nonlinearity \begin{equation*} \begin{cases} -\Delta u+\phi u= |u|^{p-2}u\log|u|+\frac{\lambda}{u^\gamma}, &\rm \mathrm{in ...
Linyan Peng   +4 more
doaj   +1 more source

KKT reformulation and necessary conditions for optimality in nonsmooth bilevel optimization [PDF]

open access: yes, 2014
For a long time, the bilevel programming problem has essentially been considered as a special case of mathematical programs with equilibrium constraints (MPECs), in particular when the so-called KKT reformulation is in question.
Zemkoho, Alain B., Dempe, Stephan
core   +1 more source

Nonlinear Periodic Systems with the p-Laplacian: Existence and Multiplicity Results

open access: yesAbstract and Applied Analysis, 2007
We study second-order nonlinear periodic systems driven by the vector p-Laplacian with a nonsmooth, locally Lipschitz potential function. Under minimal and natural hypotheses on the potential and using variational methods based on the nonsmooth critical ...
Francesca Papalini
doaj   +1 more source

Positive entire solutions of quasilinear elliptic problems via nonsmooth critical point theory [PDF]

open access: yesTopological Methods in Nonlinear Analysis, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CONTI, MONICA, GAZZOLA, FILIPPO
openaire   +4 more sources

Multiple positive solutions for a fractional Kirchhoff type equation with logarithmic and singular nonlinearities

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2023
In this paper, we study the following fractional Kirchhoff type equation \begin{equation*} \begin{cases} \left(a+b\displaystyle\int_{\mathbb{R}^N}\int_{\mathbb{R}^N}\frac{|u(x)-u(y)|^p}{|x-y|^{N+ps}}dxdy\right)(-\Delta)_p^su=|u|^{q-2}u\ln |u|^2+\frac ...
Jun Lei
doaj   +1 more source

Multiple solutions for nonlinear discontinuous strongly resonant elliptic problems

open access: yesAbstract and Applied Analysis, 2000
We consider quasilinear strongly resonant problems with discontinuous right-hand side. To develop an existence theory we pass to a multivalued problem by, roughly speaking, filling in the gaps at the discontinuity points.
Nikolaos C. Kourogenis   +1 more
doaj   +1 more source

Periodic Solutions of Second-Order Differential Inclusions Systems with -Laplacian

open access: yesAbstract and Applied Analysis, 2012
The existence of periodic solutions for nonautonomous second-order differential inclusion systems with -Laplacian is considered. We get some existence results of periodic solutions for system, a.e. , , by using nonsmooth critical point theory.
Liang Zhang, Peng Zhang
doaj   +1 more source

Resonant nonlinear periodic problems with the scalar p-Laplacian and a nonsmooth potential [PDF]

open access: yes, 2006
We study periodic problems driven by the scalar p-Laplacian with a nonsmooth potential. Using the nonsmooth critical point theory for locally Lipsctiz functions,we prove two existence theorems under conditions of resonance at infinity with respect to ...
Staicu, Vasile   +6 more
core  

Existence of solutions and of multiple solutions for nonlinear nonsmooth periodic systems [PDF]

open access: yes, 1991
summary:In this paper we examine nonlinear periodic systems driven by the vectorial $p$-Laplacian and with a nondifferentiable, locally Lipschitz nonlinearity.
Papageorgiou, EH   +7 more
core   +1 more source

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