Continuity of L-p Balls and an Application to Input-Output Systems

Abstract

In this paper, the continuity of the set-valued map p -> B-Omega,B- X,(p)(r), p is an element of (1,+infinity), is proved where B-Omega,B- X,(p)(r) is the closed ball of radius r in the space L-p(Omega, Sigma, mu; X) centered at the origin, (Omega, Sigma, mu) is a finite and positive measure space, and X is a separable Banach space. An application to input-output systems described by Urysohn type integral operators is discussed.