Special Session 93: 

Morse index and uniqueness of positive solutions of the Lane-Emden problem

Francesca De Marchis
University of Rome Sapienza
Italy
Co-Author(s):    
Abstract:
We present a Morse index computation for positive solution of the classical Lane-Emden problem in planar domains, obtained via an accurate asymptotic analysis of the solutions as the exponent tends to infinity. When the domain in convex this result allows to prove uniqueness of positive solutions (for large values of the exponent), giving a first general answer to a longstanding open problem raised by Gidas-Ni-Nirenberg [CMP, 1979]. The results are obtained in collaboration with M. Grossi, I. Ianni and F. Pacella.