Research Group:
Speaker:
P. Bolle
Institution:
University of Avignon, France
Schedule:
Tuesday, November 18, 2003 - 06:30 to 07:30
Location:
room D
Abstract:
We consider a non-linear wave equation for which all the solutions of the linearized problem at 0 are $2\pi$-periodic in time. Existence and multiplicity results for periodic solutions of fixed period are presented, under quite general assumptions on the non-linearity. These results are obtained by means of a variational principle.