Massimiliano Berti, Luca Biasco, Michela Procesi
KAM theory for the
reversible derivative wave equation
(1191K, pdf)
ABSTRACT. We prove the existence of Cantor families of small amplitude, analytic, quasi-periodic
solutions of derivative wave equations, with zero Lyapunov exponents and whose linearized equation
is reducible to constant coefficients. This result is derived by an abstract KAM theorem for in finite
dimensional reversible dynamical system