Smoothness of Density for the Area Process of Fractional Brownian Motion
arXiv:1010.3047
Abstract
We consider a process given by a two-dimensional fractional Brownian motion with Hurst parameter 1/3 < H < 1/2, along with an associated Lévy area, and prove the smoothness of a density for this process with respect to Lebesgue measure.
31 pages, 1 figure