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Coupling (probability) : ウィキペディア英語版 | Coupling (probability) In probability theory, coupling is a proof technique that allows one to compare two unrelated variables by "forcing" them to be related in some way. ==Definition==
Using the standard formalism of probability, let and be two random variables defined on probability spaces and . Then a coupling of and is a ''new'' probability space over which there are two random variables and such that has the same distribution as while has the same distribution as . An interesting case is when and are ''not'' independent.
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「Coupling (probability)」の詳細全文を読む
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