Specifically, the latter system is decoupled into two subsystems, also initial value problems, one of them defined in the orbit space associated with the reduction and the other linear in its ...

SIAM Journal on Applied Mathematics, Vol. 48, No. 6 (Dec., 1988), pp. 1227-1243 (17 pages) The aim of this paper is to contribute to the foundation of the asymptotic methods for initial-boundary value ...