Introduction to the theory of nonlinear optimization.

From the reviews of the third edition: "Jahn 's textbook provides a thorough development of optimality conditions for optimization problems on function spaces. The book will be of interest to suitably prepared graduate students and researchers who are working on problems in optimal control theory. It may also be of interest to analysts who want to learn something about how functional analysis is used in the theory of optimization." (Brain Borchers, MathDL, April, 2007)"The third edition of this book has eight chapters . The book is written in a lucid style. It may be very useful to lecturers, students, and researchers." (Stanislaw Walczak, Zentralblatt MATH, Vol. 1115 (17), 2007)