Abstract
We study the scattering problem for the pseudo-conformally invariant nonlinear Schrodinger equation in space-time R^<n+1>. In Section 1, we give a brief survey on nonlinear Schrodinger equations with various critical powers. In Section 2, the scattering problem is formulated. In Section 3, we introduce a recent joint work with R. Carles on new identities of wave operators and associated Poisson formulas.
