On the fixed points of nonexpansive mappings in direct sums of Banach spaces

Abstract

We show that if a Banach space X has the weak fixed point property for nonexpansive mappings and Y has the generalized Gossez-Lami Dozo property or is uniformly convex in every direction, then the direct sum of X and Y with a strictly monotone norm has the weak fixed point property. The result is new even if Y is finite-dimensional.

9 pages. To appear, Studia Mathematica

Cited by in corpus (2)

• The fixed point property in direct sums and modulus R(a,X)
• ${\ell }_1$ spreading models and the FPP for Cesàro mean nonexpansive maps