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arXiv · 1711.06900

Dimension of generic self-affine sets with holes

Henna Koivusalo·Michał Rams
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Abstract

Let $(Σ, σ)$ be a dynamical system, and let $U\subset Σ$. Consider the survivor set \[ Σ_U=\{x\in Σ\mid σ^n(x)\notin U\textrm{for all}n\} \] of points that never enter the subset $U$. We study the size of this set in the case when $Σ$ is the symbolic space associated to a self-affine set $Λ$, calculating the dimension of the projection of $Σ_U$ as a subset of $Λ$ and finding an asymptotic formula for the dimension in terms of the Käenmäki measure of the hole as the hole shrinks to a point. Our results hold when the set $U$ is a cylinder set in two cases: when the matrices defining $Λ$ are diagonal, and when they are such that the pressure is differentiable at its zero point, and the Käenmäki measure is a strong-Gibbs measure.

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Henna Koivusalo, Michał Rams. 2017-11-18. Dimension of generic self-affine sets with holes. https://arxiv.org/abs/1711.06900

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