Partial result on the plasticity of the unit ball of the l∞-sum of finitely many strictly convex Banach spaces

Abstract

This thesis presents a generalization of a lemma appearing in Nikita Leo’s proof of the plasticity of the closed unit ball of the l∞-sum of two strictly convex Banach spaces. The generalization is then used to show a property related to but weaker than plasticity for the closed unit ball of the l∞-sum of finitely many strictly convex Banach spaces. Two additional results related to the plasticity of closed balls in Banach spaces are also proved.