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A geometrical characterization of Banach spaces in which martingale difference sequences are unconditional. (English) Zbl 0474.60036


MSC:

60G42 Martingales with discrete parameter
46B20 Geometry and structure of normed linear spaces
60G46 Martingales and classical analysis
46C05 Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product)
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