Abstract
Let X be a Banach space with a separable dual. We prove that X embeds isomorphically into a \({{\mathcal L}_\infty}\) space Z whose dual is isomorphic to ℓ 1. If, moreover, U is a space with separable dual, so that U and X are totally incomparable, then we construct such a Z, so that Z and U are totally incomparable. If X is separable and reflexive, we show that Z can be made to be somewhat reflexive.
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E. Odell and Th. Schlumprecht was supported by the National Science Foundation.
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Freeman, D., Odell, E. & Schlumprecht, T. The universality of ℓ 1 as a dual space. Math. Ann. 351, 149–186 (2011). https://doi.org/10.1007/s00208-010-0601-8
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DOI: https://doi.org/10.1007/s00208-010-0601-8