Journal of Fourier Analysis and Applications

, Volume 13, Issue 1, pp 1–37 | Cite as

Geometric Properties of Fractional Brownian Sheets

  • Dongsheng Wu
  • Yimin Xiao


Let \(B^H=\{B^H(t), t\in {\Bbb R}_+^N\}\) be an (N, d)-fractional Brownian sheet with Hurst index H = (H1,...,HN) ∈ (0, 1)N. Our objective of the present article is to characterize the anisotropic nature of BH in terms of H. We prove the following results: (1) BH is sectorially locally nondeterministic. (2) By introducing a notion of "dimension" for Borel measures and sets, which is suitable for describing the anisotropic nature of BH, we determine \({\rm dim}_{\cal H}B^H(E)\) for an arbitrary Borel set \(E \subset (0, \infty)^N.\) Moreover, when Bα is an (N, d)-fractional Brownian sheet with index 〈α〉 = (α,..., α) (0 < α < 1), we prove the following uniform Hausdorff dimension result for its image sets: If N ≤ αd, then with probability one,
$${\rm dim}_{\cal H}B^{\langle\alpha\rangle}(E)=\frac{1}{\alpha}{\rm dim}_{\cal H}E {\rm for\ all\ Borel\ sets}\ E \subset (0, \infty)^N.$$
(3) We provide sufficient conditions for the image BH(E) to be a Salem set or to have interior points. The results in (2) and (3) describe the geometric and Fourier analytic properties of BH. They extend and improve the previous theorems of Mountford [35], Khoshnevisan and Xiao [29] and Khoshnevisan, Wu, and Xiao [28] for the Brownian sheet, and Ayache and Xiao [5] for fractional Brownian sheets.


Hausdorff Dimension Borel Measure Fractional Brownian Motion Borel Probability Measure Brownian Sheet 
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Copyright information

© Birkhauser Boston 2007

Authors and Affiliations

  1. 1.Department of Statistics and Probability, A-413, Wells Hall, Michigan State UniversityEast Lansing, MI 48824USA
  2. 2.Department of Mathematical Sciences, University of Alabama in HuntsvilleHuntsville, AL 35758USA

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