Cauchy problem for hyperbolic operators with triple characteristics of variable multiplicity

Enrico Bernardi, Antonio Bove, Vesselin Petkov

We study a class of third order hyperbolic operators $P$ in $G=\Omega \cap \{0\le t\le T\},\Omega \subset {\mathbb{R}}^{n+1}$ with triple characteristics on $t=0$. We consider the case when t…