20 research outputs found
Nontrivial solutions of variational inequalities. The degenerate case
We consider a class of asymptotically linear variational inequalities.
We show the existence of a nontrivial solution under assumptions
which allow the problem to be degenerate at the origin
Existence of nontrivial solutions for semilinear problems with strictly differentiable nonlinearity
The existence of a nontrivial solution for semilinear elliptic
problems with strictly differentiable nonlinearity is proved. A
result of homological linking under nonstandard geometrical
assumption is also shown. Techniques of Morse theory are employed
Lagrangian systems with Lipschitz obstacle on manifolds
Lagrangian systems constrained on the closure of an open subset
with Lipschitz boundary in a manifold are considered. Under
suitable assumptions, the existence of infinitely many periodic
solutions is proved
Perturbations of critical values in nonsmooth critical point theory
* Supported by Ministero dellāUniversitĆ e della Ricerca Scientifica e Tecnologica (40% ā 1993).
** Supported by Ministero dellāUniversitĆ e della Ricerca Scientifica e Tecnologica (40% ā 1993).The perturbation of critical values for continuous functionals is studied.
An application to eigenvalue problems for variational inequalities is provided
Nontrivial solutions of p-superlinear p-Laplacian problems via a cohomological local splitting
We consider a quasilinear equation, involving the p-Laplace operator, with a
p-superlinear nonlinearity. We prove the existence of a nontrivial solution, also when
there is no mountain pass geometry, without imposing a global sign condition. Techniques
of Morse theory are employed