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Kazamaki's condition : ウィキペディア英語版 | Kazamaki's condition In mathematics Kazamaki's condition gives a sufficient criterion ensuring that the Doléans-Dade exponential of a local martingale is a true martingale. This is particularly important if Girsanov's theorem is to be applied to perform a change of measure. Kazamaki's condition is more general than Novikov's condition. == Statement of Kazamaki's condition == Let be a continuous local martingale with respect to a right-continuous filtration . If is a uniformly integrable submartingale, then the Doléans-Dade exponential ''(unicode:Ɛ)''(''M'') of M is a uniformly integrable martingale.
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