Recently, Lee introduced and studied the separable weak bounded approximation property (BAP). Lee proved that the separable weak BAP of X∗\documentclass[12pt]{minimal}
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\begin{document}$${X^*}$$\end{document}, the dual space of a Banach space X\documentclass[12pt]{minimal}
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\begin{document}$${X}$$\end{document}, coincides with the BAP of X∗\documentclass[12pt]{minimal}
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\begin{document}$${X^*}$$\end{document} whenever X∗∗\documentclass[12pt]{minimal}
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\begin{document}$${X^{**}}$$\end{document} has the weak Radon–Nikodým property. We show that the separable weak BAP and the BAP are always the same properties.
机构:
Univ Tartu, Inst Math & Stat, J Liivi 2, EE-50409 Tartu, Estonia
Estonian Acad Sci, Kohtu 6, EE-10130 Tallinn, EstoniaUniv Tartu, Inst Math & Stat, J Liivi 2, EE-50409 Tartu, Estonia
机构:
Konkuk Univ, Inst Ubiquitous Informat Technol & Applicat, Seoul 143701, South KoreaKonkuk Univ, Inst Ubiquitous Informat Technol & Applicat, Seoul 143701, South Korea
机构:
Univ Franche Comte, Lab Math Besancon, UMR CNRS 6623, F-25030 Besancon, FranceUniv Franche Comte, Lab Math Besancon, UMR CNRS 6623, F-25030 Besancon, France