We examine common supercyclic vectors for a path of operators. In particular, we show that the path consisting of convex combinations of two arbitrary unilateral weighted backward shifts has a dense G δ set of common supercyclic vectors. Moreover, we show there exists a path with a dense G δ set of common supercyclic vectors between a unilateral weighted backward shift which satisfies the Supercyclicity Criterion, and an operator which does not. Lastly, we provide an example of a path of unilateral weighted backward shifts that fails to have a common supercyclic vector.
Using the techniques of the hypercyclicity criterion, we prove that there is a meromorphic function f ( z ) on the complex plane whose translates f(z + n) for all n 1 1, are dense in the metric space of meromorphic functions on any region in the plane. In addition, we prove the analogue of the result for non-Euclidean translation on the unit disk.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.