[ [ [ Duality and Perturbation Methods in Critical Point Theory[ DUALITY AND PERTURBATION METHODS IN CRITICAL POINT THEORY ] By Ghoussoub, N. ( Author )Aug-01-2008 Paperback
Building on min-max methods, Professor Ghoussoub systematically develops a general theory that can be applied in a variety of situations. In so doing he also presents a whole new array of duality and perturbation methods. The prerequisites for following this book are relatively few; an appendix sketching certain methods in analysis makes the book self-contained.