Weighted composition operators on spaces of analytic functions on the   complex half-plane
  In this paper we will show how the boundedness condition for the weighted composition operators on a class of spaces of analytic functions on the open right complex half-plane called Zen spaces (which include the Hardy spaces and weighted Bergman spaces) can be stated in terms of Carleson measures and Bergman kernels. In Hilbertian setting we will also show how the norms of \emph{causal} weighted composition operators on these spaces are related to each other and use it to show that an \emph{(unweighted) composition operator} $C_\varphi$ is bounded on a Zen space if and only if $\varphi$ has a finite angular derivative at infinity. Finally, we will show that there is no compact composition operator on Zen spaces. 
Andrzej S. Kucik
math.FA