Asymptotics of higher order hyperbolic equations with one or two dissipative lower order terms

Marcello D'Abbicco

In this paper, we consider the Cauchy problem for a hyperbolic equation $Q({\partial }_t,{\partial }_x)u=0$ of any order $m\ge 3$, where $t\ge 0$ and $x\in {\mathbb{R}}^n$, and $Q=P_m+P_{m-…