Bounded distance equivalence of cut-and-project sets and equidecomposability

Abstract

We show that given a lattice $\Gamma \subset \mathbb{R}^m \times \mathbb{R}^n$, and projections $p_1$ and $p_2$ onto $\mathbb{R}^m$ and $\mathbb{R}^n$ respectively, cut-and-project sets obtained using Jordan measurable windows $W$ and $W'$ in $\mathbb{R}^n$ of equal measure are bounded distance equivalent only if $W$ and $W'$ are equidecomposable by translations in $p_2(\Gamma)$. As a consequence, we obtain an explicit description of the bounded distance equivalence classes in the hulls of simple quasicrystals.