Dimension and product structure of hyperbolic measures

• 成果类型: Article
• 署名作者: Barreira, L; Pesin, Y; Schmeling, J
• 刊物名称: ANNALS OF MATHEMATICS
• ISSN/ISSBN: 0003-486X
• DOI: 10.2307/121072
• 发表日期: 1999
• 页码: 755-783
• 关键词: strange attractors; exponents; entropy; MAPS; sets

摘要

We prove that every hyperbolic measure invariant under a C1+alpha diffeomorphism of a smooth Riemannian manifold possesses asymptotically almost local product structure, i.e., its density can be approximated by the product of the densities on stable and unstable manifolds up to small exponentials. This has not been known even for measures supported on locally maximal hyperbolic sets. Using this property of hyperbolic measures we prove the long-standing Eckmann-Ruelle conjecture in dimension theory of smooth dynamical systems: the pointwise dimension of every hyperbolic measure invariant under a C1+alpha diffeomorphism exists almost everywhere. This implies the crucial fact that virtually all the characteristics of dimension type of the measure (including the Hausdorff dimension, box dimension, and information dimension) coincide. This provides the rigorous mathematical justification of the concept of fractal dimension for hyperbolic measures.