The book provides an introduction to minimax methods in critical point theory and shows their use in existence questions for nonlinear differential equations. A

FACHGEB The last decade has seen a tremendous development in critical point theory in infinite dimensional spaces and its application to nonlinear boundary valu

This text starts at the foundations of the field, and is accessible with some background in functional analysis. As such, the book is ideal for classroom of sel

This book presents some of the latest research in critical point theory, describing methods and presenting the newest applications. Coverage includes extrema, e

The papers collected in this volume are contributions to the 33rd session of the Seminaire de Mathematiques Superieures (SMS) on "Topological Methods in Differe