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Embedding of random vectors into continuous martingales

E. Dettweiler — 1999

Studia Mathematica

Let E be a real, separable Banach space and denote by L 0 ( Ω , E ) the space of all E-valued random vectors defined on the probability space Ω. The following result is proved. There exists an extension Ω ˜ of Ω, and a filtration ( ˜ t ) t 0 on Ω ˜ , such that for every X L 0 ( Ω , E ) there is an E-valued, continuous ( ˜ t ) -martingale ( M t ( X ) ) t 0 in which X is embedded in the sense that X = M τ ( X ) a.s. for an a.s. finite stopping time τ. For E = ℝ this gives a Skorokhod embedding for all X L 0 ( Ω , ) , and for general E this leads to a representation of random vectors as...

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