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Snell envelope : ウィキペディア英語版 | Snell envelope
The Snell envelope, used in stochastics and mathematical finance, is the smallest supermartingale dominating a stochastic process. The Snell envelope is named after James Laurie Snell. == Definition == Given a filtered probability space and an absolutely continuous probability measure then an adapted process is the Snell envelope with respect to of the process if # is a -supermartingale # dominates , i.e. -almost surely for all times # If is a -supermartingale which dominates , then dominates .
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Snell envelope」の詳細全文を読む
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