Sample Path Properties of Bifractional Brownian Motion

Details Sample Path Properties of Bifractional Brownian Motion Sample Path Properties of Bifractional Brownian Motion

2006-06-29

arxiv.org/abs/math/0606753v2

Bernoulli 13, 4 (2007) 1023-1052

Mathematics

Probability

Scientific paper

Let $B^{H, K}= \big\{B^{H, K}(t), t \in \R_+ \big\}$ be a bifractional Brownian motion in $\R^d$. We prove that $B^{H, K}$ is strongly locally nondeterministic. Applying this property and a stochastic integral representation of $B^{H, K}$, we establish Chung's law of the iterated logarithm for $B^{H, K}$, as well as sharp H\"older conditions and tail probability estimates for the local times of $B^{H, K}$. We also consider the existence and the regularity of the local times of multiparameter bifractional Brownian motion $B^{\bar{H}, \bar{K}}= \big\{B^{\bar{H}, \bar{K}}(t), t \in \R^N_+ \big\}$ in $\R^d$ using Wiener-It\^o chaos expansion.

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