(1) Graduate School of Mathematical Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan,, JP;(2) Department of Mathematics, Beijing Normal University, Beijing 100875, China, CN
Abstract:
Summary. We prove that the average speed of effective energy propagation of the waves satisfying long wave length condition in some globally fractal-like manifolds is asymptotically zero. Received: 17 March 1995 / In revised form: 16 September 1997