Revisiting the method of sub- and supersolutions for nonlinear elliptic problems.
Some global bifurcation problems for variational inequalities
On critical points for noncoercive functionals and subharmonic solutions of some Hamiltonian systems.
On variational inequalities associated with the Navier-Stokes equation: Some bifurcation problems.
On the number of solutions of boundary value problems involving the -Laplacian.
Sub-supersolution theorems for quasilinear elliptic problems: A variational approach.
Boundary Value Problems for Nonlinear Second Order Differential Equations.
Periodic Solutions of Nonlinear Second Order Differential Equations.
Nonlinear eigenvalue problems with the parameter near resonance
On minimizing noncoercive functionals on weakly vlosed sets
We consider noncoercive functionals on a reflexive Banach space and establish minimization theorems for such functionals on smooth constraint manifolds. The functionals considered belong to a class which includes semi-coercive, compact-coercive and P-coercive functionals. Some applications to nonlinear partial differential equations are given.
An existence theorem for periodic boundary value problems for systems of second order diffferential equations
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