Niveau: Supérieur, Doctorat, Bac+8
Abstract In these lectures, which are based on re- cent joint work with A. Seeger [23], I shall present sharp analogues of classical estimates by Peral and Miyachi for solutions of the standard wave equation on Euclidean space in the context of the wave equation associ- ated to the sub-Laplacian on a Heisenberg type group. Some related questions, such as spectral multipliers for the sub-Laplacian or Strichartz-estimates, will be briefly ad- dressed. Our results improve on earlier joint work of mine with E.M. Stein. The new ap- proach that we use has the additional advan- tage of bringing out more clearly the con- nections of the problem with the underlying sub-Riemannian geometry. 0-0
- wave equation
- present sharp analogues
- metaplec- tic group
- unique skew-symmetric
- sub- riemannian geometry