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Esscher transform : ウィキペディア英語版 | Esscher transform In actuarial science, the Esscher transform is a transform that takes a probability density ''f''(''x'') and transforms it to a new probability density ''f''(''x''; ''h'') with a parameter ''h''. It was introduced by F. Esscher in 1932 . ==Definition==
Let ''f''(''x'') be a probability density. Its Esscher transform is defined as : More generally, if ''μ'' is a probability measure, the Esscher transform of ''μ'' is a new probability measure ''Eh''(''μ'') which has density : with respect to ''μ''.
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「Esscher transform」の詳細全文を読む
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