  The present volume is the written version of the series of lectures the
author delivered at the Catholic University of Leuven, Belgium during the
period of June-July, 1990. The main purpose of these talks is to present some
of author's work and also his joint works with Professor T. Nagano and
Professor Y. Tazawa of Japan, Professor P. F. Leung of Singapore and Professor
J. M. Morvan of France on geometry of slant submanifolds and its related
subjects in a systematical way.
