Generalised intermediate dimensions

Abstract

We introduce a family of dimensions, which we call the $\Phi$-intermediate dimensions, that lie between the Hausdorff and box dimensions and generalise the intermediate dimensions introduced by Falconer, Fraser and Kempton. This is done by restricting the relative sizes of the covering sets in a way that allows for greater refinement than in the definition of the intermediate dimensions. We also extend the theory from Euclidean space to a wider class of metric spaces. We prove that these dimensions can be used to 'recover the interpolation' between the Hausdorff and box dimensions of compact subsets for which the intermediate dimensions are discontinuous at $\theta =0$, thus providing finer geometric information about such sets. We prove continuity-like results involving the Assouad and lower dimensions, which give a sharp general lower bound for the intermediate dimensions that is positive for all $\theta \in (0,1]$ for sets with positive box dimension. We also prove Hölder distortion estimates, a mass distribution principle, and a Frostman type lemma, which we use to study dimensions of product sets.

36 pages, 0 figures. Improved exposition of paper, resulting in it becoming shorter and some numbering changes. Strengthened results in Section 3 by incorporating the lower dimension. To appear in Monatshefte für Mathematik

References in corpus (5)

• Attainable forms of intermediate dimensions
• Intermediate dimension of images of sequences under fractional Brownian motion
• On the intermediate dimensions of Bedford-McMullen carpets
• On the intermediate dimensions of concentric spheres and related sets
• Dimensions of popcorn-like pyramid sets

Cited by in corpus (7)

• Attainable forms of intermediate dimensions
• Intermediate dimensions of Bedford-McMullen carpets with applications to Lipschitz equivalence
• Intermediate dimensions of infinitely generated attractors
• Assouad type dimensions of infinitely generated self-conformal sets
• Interpolating with generalized Assouad dimensions
• Intermediate dimensions of measures: Interpolating between Hausdorff and Minkowski dimensions
• Intermediate dimensions of complementary sets