Propagation des singularités des solutions d'équations pseudo-différentielles quasi-homogènes
Propagation des singularités des solutions d'équations pseudo-différentielles quasi-homogènes
Our aim is to describe results of propagation of singularities for pseudo-differential operators which symbols behave as an asymptotic expansion of quasi homogeneous functions; it is the case, for instance, of pseudo-differential operators with multiple involutive characteristics being reduced by a suitable canonical transform. We prove these results by a …