Quasinormable Fréchet spaces and M. W. Wong's inequality

Eduard A. Nigsch, Norbert Ortner

A short proof of M. W. Wong's inequality $\Vert J_{-s}\phi {\Vert }_p\le \epsilon \Vert J_{-t}\phi {\Vert }_p+C\Vert \phi {\Vert }_p$ is given.