These proceedings contain recent developments on the following topics: variational problems, fully nonlinear elliptic equations, PDE from differential geometry, Hamilitonian systems, nonlinear evolution equations and nonlinear microlocal analysis.

Variational problems in celestial mechanics, A. Abrosetti; variational problems of Yamabe type, A. Bahri; some applications of Morse theory to dynamic systems, V. Benci; nonlinear microlocal analysis and 2d fluid mechanics, J.Y. Chemin; fully multidimensional Cauchy problem for semilinear hyperbolic equations of 2nd order with discontinuous data, S-X. Chen; the wave equation outside a corner in 2-space dimension on Darboux systems, G. Lebeau and F.H. Lin; on the stability and instability of steady states of a nonlinear heat equation, W.M. Ni; Morse-Conley theory for minimal surfaces of varying topological type, M. Struwe; on the Co estimates for the complex Monge Ampere equation, G. Tian.