Hausdorff Measure of Trajectories of Multiparameter Fractional Brownian Motion
Talagrand, Michel
Ann. Probab., Tome 23 (1995) no. 3, p. 767-775 / Harvested from Project Euclid
Consider $0 < \alpha < 1$ and the Gaussian process $Y(t)$ on $\mathbb{R}^N$ with covariance $E(Y(t)Y(s)) = |t|^{2\alpha} + |s|^{2\alpha} - |t - s|^{2\alpha}$, where $|t|$ is the Euclidean norm of $t$. Consider independent copies $X^1,\ldots,X^d$ of $Y$ and the process $X(t) = (X^1(t),\ldots,X^d(t))$ valued in $\mathbb{R}^d$. In the transient case $(N < \alpha d)$ we show that a.s. for each compact set $L$ of $\mathbb{R}^N$ with nonempty interior, we have $0 < \mu_\varphi(X(L)) < \infty$, where $\mu_\varphi$ denotes the Hausdorff measure associated with the function $\varphi(\varepsilon) = \varepsilon^{N/\alpha} \log \log(1/\varepsilon)$. This result extends work of A. Goldman in the case $\alpha = 1/2$; the proofs are considerably simpler.
Publié le : 1995-04-14
Classification:  Haussdorff dimension,  Brownian motion,  60G15,  60G17,  26B15
@article{1176988288,
     author = {Talagrand, Michel},
     title = {Hausdorff Measure of Trajectories of Multiparameter Fractional Brownian Motion},
     journal = {Ann. Probab.},
     volume = {23},
     number = {3},
     year = {1995},
     pages = { 767-775},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1176988288}
}
Talagrand, Michel. Hausdorff Measure of Trajectories of Multiparameter Fractional Brownian Motion. Ann. Probab., Tome 23 (1995) no. 3, pp.  767-775. http://gdmltest.u-ga.fr/item/1176988288/