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A characterization of bounded convex approximation properties

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Abstract

The characterization of bounded approximation properties defined by arbitrary operator ideals due to Oja is extended to bounded convex approximation properties. As an application, it is shown that the unique extension property of a Banach space X enables to lift the metric convex approximation property from a Banach space X to its dual space X*.

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Correspondence to Silja Veidenberg.

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Veidenberg, S. A characterization of bounded convex approximation properties. Arch. Math. 107, 523–529 (2016). https://doi.org/10.1007/s00013-016-0952-9

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