Abstract
It is proved that every infinite dimensional separable Banach space having the separable extension property is isomorphic to c0. It is also proved that every Banach space with a separable dual is “close” to a space of continuous functions on a countable compact space.
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This research has been partially supported by NSF Grant MPS 72-04634-A03.
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Zippin, M. The separable extension problem. Israel J. Math. 26, 372–387 (1977). https://doi.org/10.1007/BF03007653
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DOI: https://doi.org/10.1007/BF03007653