A simple result of microlocal analysis would be, if P is a differential operator then $WF(Pu) \subseteq WF(u)$, where WF denotes the wave front set of the distribution. Can anyone give me an example where the inclusion is strict.
Thanks in advance.
A simple result of microlocal analysis would be, if P is a differential operator then $WF(Pu) \subseteq WF(u)$, where WF denotes the wave front set of the distribution. Can anyone give me an example where the inclusion is strict.
Thanks in advance.