On the $K$-theory of $C^*$-algebras associated to substitution tilings
Volume 551 / 2020
Dissertationes Mathematicae 551 (2020), 1-133
MSC: 52C23, 46L80, 37D15.
DOI: 10.4064/dm800-4-2020
Published online: 28 July 2020
Abstract
Under suitable conditions, a substitution tiling gives rise to a Smale space, from which three equivalence relations can be constructed, namely the stable, unstable, and asymptotic equivalence relations. We denote by $S$, $U$, and $A$ their corresponding $C^*$-algebras in the sense of Renault. We show that the $K$-theories of $S$ and $U$ can be computed from the cohomology and homology of a single cochain complex with connecting maps for tilings of the line and of the plane. Moreover, we provide formulas to compute the $K$-theory for these three $C^*$-algebras. Furthermore, we show that the $K$-theory groups for tilings of dimension 1 are always torsion free. For tilings of dimension 2, only $K_0(U)$ and $K_1(S)$ can contain torsion.
