Results 61 to 70 of about 218 (139)

Erratum to: "On a functional satisfying a weak Palais-Smale condition"

open access: yesDiscrete and Continuous Dynamical Systems, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Ground-state solutions of a Hartree–Fock type system involving critical Sobolev exponent

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
In this paper, ground-state solutions to a Hartree–Fock type system with a critical growth are studied. Firstly, instead of establishing the local Palais–Smale (P.-S.) condition and estimating the mountain-pass critical level, a perturbation method is ...
Xiaoli Zhu, Zushun Min
doaj   +1 more source

Global hyperbolicity and Palais–Smale condition for action functionals in stationary spacetimes

open access: yesAdvances in Mathematics, 2008
In order to apply variational methods to the action functional for geodesics of a stationary spacetime, some hypotheses, useful to obtain classical Palais-Smale condition, are commonly used: pseudo-coercivity, bounds on certain coefficients of the metric, etc.
CANDELA, Anna Maria   +2 more
openaire   +3 more sources

Existence result for the CR-Yamabe equation

open access: yesBruno Pini Mathematical Analysis Seminar, 2013
In this note we will prove that the CR-Yamabe equation has infinitely many changing-sign solutions. The problem is variational but the associated functional does not satisfy the Palais-Smale compactness condition; by mean of a suitable group action we ...
Vittorio Martino
doaj  

Periodic Solutions of Classical Hamiltonian Systems without Palais–Smale Condition

open access: yesJournal of Mathematical Analysis and Applications, 2002
The authors consider the second order Hamiltonian system \(\ddot{u}+V_u(t,u)=0\) where \(V:\mathbb R\times\mathbb R^N\rightarrow\mathbb R\) is \({\mathcal{C}}^2\), \(T\)-periodic in \(t\), and \(V_u\) is globally bounded. Further conditions on \(V\) for \(|u|\rightarrow\infty\) are not required.
Fei, Guihua   +2 more
openaire   +2 more sources

A note on Palais-Smale condition in the sense of Szulkin

open access: yesDifferential and Integral Equations, 1993
It has been observed [\textit{L. Caklovic}, \textit{Sh. Li} and \textit{M. Willem}, Differ. Integral Equ. 3, No. 4, 799-800 (1990; see the review above)] that, for a Gâteaux differentiable lower semicontinuous function bounded from below on a Banach space, the Palais-Smale condition implies coercivity.
openaire   +3 more sources

On new critical point theorems without the Palais–Smale condition

open access: yesEgyptian Journal of Basic and Applied Sciences, 2016
AbstractIn this paper we prove new theorems on critical point theory based on the weak Ekeland's variational principle.
Briki, Mabrouk   +2 more
openaire   +1 more source

Khovanov homotopy type, periodic links and localizations. [PDF]

open access: yesMath Ann, 2021
Borodzik M, Politarczyk W, Silvero M.
europepmc   +1 more source

Asymmetric superlinear problems under strong resonance conditions

open access: yesElectronic Journal of Differential Equations, 2017
We study the existence and multiplicity of solutions of the problem $$\displaylines{ -\Delta u = -\lambda_1 u^- + g(x,u),\quad \text{in } \Omega; \cr u = 0, \quad \text{on } \partial\Omega, }$$ where $\Omega$ is a smooth bounded domain in $\mathbb{R ...
Leandro Recova, Adolfo J. Rumbos
doaj  

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