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Distortion risk measure : ウィキペディア英語版 | Distortion risk measure
In financial mathematics, a distortion risk measure is a type of risk measure which is related to the cumulative distribution function of the return of a financial portfolio. == Mathematical definition == The function associated with the distortion function is a ''distortion risk measure'' if for any random variable of gains (where is the Lp space) then : where is the cumulative distribution function for and is the dual distortion function .〔 If almost surely then is given by the Choquet integral, i.e. Equivalently, is the probability measure generated by , i.e. for any the sigma-algebra then .
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