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Uniform convergence of reversed martingales

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A necessary and sufficient condition for the uniform convergence of a family of reversed martingales converging to a degenerated limiting process is given. The condition is expressed by means of regular convergence (in Hardy's sense) of corresponding means. It is shown that the given regular convergence is equivalent to Hoffmann-Jørgensen's eventually totally boundedness in the mean which is necessary and sufficient for the uniform law of large numbers. Analogous results are carried out for families of reversed submartingales. By applying derived results several convergence statements are obtained which extend those from the uniform law of large numbers to the general reversed martingale case.

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Peškir, G. Uniform convergence of reversed martingales. J Theor Probab 8, 387–415 (1995). https://doi.org/10.1007/BF02212885

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Key Words

  • Reversed martingale
  • uniform convergence
  • Hardy's convergence
  • totally bounded in the mean