2 problems

Let $L$ be a maximal dissipative operator and let $M$ be a dissipative operator such that ${\rm Dom}(M)\subset {\rm Dom}(L)$ and $K=M-L$ satisfies … for some $c\geq 0$ and $d<1$. T…

Let $K$ be a strictly convex obstacle with boundary $\Gamma$, let $G$ be the dissipative acoustic operator, and let $\gamma(x)$ satisfy … For the ball $B_3$ and constant $\gamma$ i…