Nicolas GONZALEZ
An Example of Pure Stability for the Wave Equation with Moving Boundary
(23K, LaTex)

ABSTRACT.  This paper studies the behavior of the energy of the wave equation solution in a finite moving domain 0<x<a(t) with a(t) assumed to move slower than the light and periodically. Moreover $a$ is continuous, piecewise linear with two independent parameters. 
always bounded and give results which involve only the independent parameters. The proof is based on the determination of the invariant measure of a homeomorphism of the circle related to a.