Abstract
In this paper we study Cuntz--Pimsner algebras associated to -correspondences over commutative -algebras from the point of view of the -algebra classification programme. We show that when the correspondence comes from an aperiodic homeomorphism of a finite-dimensional infinite compact metric space twisted by a vector bundle, the resulting Cuntz--Pimsner algebras have finite nuclear dimension. When the homeomorphism is minimal, this entails classification of these -algebras by the Elliott invariant. This establishes a dichotomy: when the vector bundle has rank one, the Cuntz--Pimsner algebra has stable rank one. Otherwise, it is purely infinite. For a Cuntz--Pimsner algebra of a minimal homeomorphism of an infinite compact metric space twisted by a line bundle over , we introduce orbit-breaking subalgebras. With no assumptions on the dimension of , we show that they are centrally large subalgebras and hence simple and stably finite. When the dimension of is finite, they are furthermore -stable and hence classified by the Elliott invariant.
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