Every nonnegative submartingale is the absolute value of a martingale (Q1240966)

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scientific article; zbMATH DE number 3567716
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Every nonnegative submartingale is the absolute value of a martingale
scientific article; zbMATH DE number 3567716

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    Every nonnegative submartingale is the absolute value of a martingale (English)
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    1977
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