Nonlinear Spectral Theory

"This text will certainly serve as an excellent reference book for many years."
EMS Newsletter 3/2005

"The book can be considered as a systematic introduction to this area, emphasizing the diversity of directions in which current research in nonlinear spectral ist developing."
S. Cobzas in: Studia Universitatis Babes-Boyai 1/2005

"This carefully written book is a comprehensive treatment of the subject including new results several of them archieved by the author. [...] This research monograph is recommended to scientists interested in the theory of nonlinar operators and their applications."
R. Schumann in ZAA 4/2004

"One of the features of the book is that it provides many examples, varying from trivial to profound, to illustrate exactly what can and cannot happen. Each chapter ends with a valuable "Notes and remarks'' section; some of these contain some open problems. The book is well written, the presentation is self-contained, and the text may be read by anyone with a background in functional analysis who knows a little nonlinear analysis." Mathematical Reviews

"This text will certainly serve as an excellent reference book for many years."EMS Newsletter 3/2005 "The book can be considered as a systematic introduction to this area, emphasizing the diversity of directions in which current research in nonlinear spectral ist developing."S. Cobzas in: Studia Universitatis Babes-Boyai 1/2005 "This carefully written book is a comprehensive treatment of the subject including new results several of them archieved bythe author. [...] This research monograph is recommended to scientists interested in the theory of nonlinar operators and their applications."R. Schumann in ZAA 4/2004