The series is devoted to the publication of high level monographs which cover the whole spectrum of current nonlinear analysis and applications in various fields such as optimization control theory systems theory mechanics engineering and other sciences One of its main objectives is to make available to the professional community expositions of results and foundations of methods that play an important role in both the theory and applications of nonlinear analysis Contributions which are on the borderline of nonlinear analysis and related fields and which stimulate further research at the crossroads of these areas are particularly welcome Editor in Chief Jurgen Appell Wurzburg Germany Honorary and Advisory Editors Catherine Bandle Basel Switzerland Alain Bensoussan Richardson Texas USA Avner Friedman Columbus Ohio USA Umberto Mosco Worcester Massachusetts USA Louis Nirenberg New York USA Alfonso Vignoli Rome Italy Editorial Board Manuel del Pino Bath UK and Santiago Chile Mikio Kato Nagano Japan Wojciech Kryszewski Torun Poland Vicentiu D Radulescu Krakow Poland Simeon Reich Haifa Israel Please submit book proposals to Jurgen Appell Titles in planning include Lucio Damascelli and Filomena Pacella Morse Index of Solutions of Nonlinear Elliptic Equations 2019 Tomasz W Dlotko and Yejuan Wang Critical Parabolic Type Problems 2019 Rafael Ortega Periodic Differential Equations in the Plane A Topological Perspective 2019 Ireneo Peral Alonso and Fernando Soria Elliptic and Parabolic Equations Involving the Hardy Leray Potential 2020 Cyril Tintarev Profile Decompositions and Cocompactness Functional Analytic Theory of Concentration Compactness 2020 Takashi Suzuki Semilinear Elliptic Equations Classical and Modern Theories 2021