Abstract
Let X and Y be locally compactσ-compact topological spaces, F ⊂X×Y is closed, and P(F) is the set of all Borel probability measures on F. For us to find, for the pair of probability measures (μx, μy εP (X)×P(Y), a probability measureμ ε P(F) such that μ X =μΠ −1 X , μ Y =μΠ −1 Y it is necessary and sufficient that, for any pair of Borel sets A ⊂X, B ⊂Y for which (A× B) ∩ F=Ø, the conditionμ XA+μ YB ≤ 1 holds.
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V. Strassen, “Probability measures with given marginals,” American Mathematical Society,36, No. 2 (1965).
V. N. Sudakov, “On the existence of bistochastic planes,” Zipiski Nauchnykh Seminarov LOMI,29, Leningrad (1972).
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Translated from Matematicheskie Zametki, Vol. 14, No. 4, pp. 573–576, October, 1973.
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Sudakov, V.N. The existence of probability measures with specified projections. Mathematical Notes of the Academy of Sciences of the USSR 14, 886–888 (1973). https://doi.org/10.1007/BF01108820
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DOI: https://doi.org/10.1007/BF01108820