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arxiv: 0907.1618 · v1 · submitted 2009-07-09 · 🧮 math.PR

Are fractional Brownian motions predictable?

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keywords localpredictorbrownianhurstindexpredictableadmitcalled
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We provide a device, called the local predictor, which extends the idea of the predictable compensator. It is shown that a fBm with the Hurst index greater than 1/2 coincides with its local predictor while fBm with the Hurst index smaller than 1/2 does not admit any local predictor. The local predictor of a martingale (in particular: Brownian motion) trivially exists and equals 0.

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