Article ID Journal Published Year Pages File Type
4590169 Journal of Functional Analysis 2014 9 Pages PDF
Abstract

We show that the strong approximation property (strong AP) (respectively, strong CAP) and the weak bounded approximation property (respectively, weak BCAP) are equivalent for every Banach space. This gives a negative answer to Oja's conjecture. As a consequence, we show that each of the spaces c0c0 and ℓ1ℓ1 has a subspace which has the AP but fails to have the strong AP.

Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory
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