Boundary Behaviour of Dirchlet Eigenfunctions of Second Order Elliptic Operators.
Boundary values of analytic semigroups and associated norm estimates
The theory of quasimultipliers in Banach algebras is developed in order to provide a mechanism for defining the boundary values of analytic semigroups on a sector in the complex plane. Then, some methods are presented for deriving lower estimates for operators defined in terms of quasinilpotent semigroups using techniques from the theory of complex analysis.
Branching Semigroups on Banach Lattices.