On a Superlinear Elliptic Boundary Value Problem.
On nonlinear eigenvaule problems.
On some Banach space constants arising in nonlinear fixed point and eigenvalue theory.
On the discreteness of the spectra of the Dirichlet and Neumann -biharmonic problems.
On the linearization of some singular, nonlinear elliptic problems and applications
On the multiplicity of critical points for parameterized functionals on reflexive Banach spaces
Some general multiplicity results for critical points of parameterized functionals on reflexive Banach spaces are established. In particular, one of them improves some aspects of a recent result by B. Ricceri. Applications to boundary value problems are also given.
Operadores Integrales De Hammerstein, Su Espectro Y Aplicaciones.