A version of Hörmander’s theorem for the fractional Brownian motion

نویسندگان

  • Fabrice Baudoin
  • Martin Hairer
چکیده

It is shown that the law of an SDE driven by fractional Brownian motion with Hurst parameter greater than 1/2 has a smooth density with respect to Lebesgue measure, provided that the driving vector fields satisfy Hörmander’s condition. The main new ingredient of the proof is an extension of Norris’ lemma to this situation.

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تاریخ انتشار 2008