On the numerical range of generators of symmetric $L_{\infty }$-contractive semigroups

Markus Haase, Peer Christian Kunstmann, Hendrik Vogt

A result by Liskevich and Perelmuter from 1995 yields the optimal angle of analyticity for symmetric submarkovian semigroups on $L_p$, $1<p<\infty$. C.~Kriegler showed in 2011 that…