Convex combinations of weak*-convergent sequences and the Mackey topology

2016/01/21 by Avilés, Antonio, Rodríguez, José
#46B26 #46B50 #FOS: Mathematics #Functional Analysis (math.FA)

paper · doi:10.48550/arxiv.1601.05825

Abstract

A Banach space X is said to have property (K) if every w^*-convergent sequence in X^* admits a convex block subsequence which converges with respect to the Mackey topology. We study the connection of this property with strongly weakly compactly generated Banach spaces and its stability under subspaces, quotients and ℓ^p-sums. We extend a result of Frankiewicz and Plebanek by proving that property (K) is preserved by ℓ¹-sums of less than \mathfrakp summands. Without any cardinality restriction, we show that property (K) is stable under ℓ^p-sums for 1

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