Universal Sequences of Composition Operators

Let G and $$\Omega $$ be two planar domains. We give necessary sufficient conditions on a sequence $$(\phi _n)$$ of eventually injective holomorphic mappings from to for the existence function $$f\in H(\Omega )$$ whose orbit under composition by is dense in H(G). This extends result same nature obtained Grosse-Erdmann Mortini when $$G=\Omega . An interconnexion between topological properties appears. Further, order exhibit natural way functions with wild boundary behaviour domains, we study certain type universality sequences continuous union Jordan curves domain.