Uniform Integrability - Formal Definition

Formal Definition

The following definition applies.

  • A class of random variables is called uniformly integrable(UI) if given, there exists such that, where is the indicator function .
  • An alternative definition involving two clauses may be presented as follows: A class of random variables is called uniformly integrable if:
    • There exists a finite such that, for every in, .
    • For every there exists such that, for every measurable such that and every in, .

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