Morse Index of Solutions of Nonlinear Elliptic Equations (De Gruyter Series in Nonlinear Analysis and Applications 30) (2019. XV, 254 S. 8 b/w ill. 240 mm)

§16§§This monograph presents in a unified manner the use of the Morse index, and especially its connections to the maximum principle, in the study of nonlinear elliptic equations. The knowledge or a bound on the Morse index of a solution is a very important qualitative information which can be used in several ways for different problems, in order to derive uniqueness, existence or nonexistence, symmetry, and other properties of solutions. § §02§Lucio Damascelli, University of Rome "Tor Vergata", Italy; Filomena Pacella, University of Rome "La Sapienza", Italy