C*-Algebraic Characterization of Bounded Orbit Injection Equivalence for Minimal Free Cantor Systems

Details C*-Algebraic Characterization of Bounded Orbit Injection Equivalence for Minimal Free Cantor Systems C*-Algebraic Characterization of Bounded Orbit Injection Equivalence for Minimal Free Cantor Systems

2009-03-10

arxiv.org/abs/0903.1881v4

Mathematics

Dynamical Systems

30 pages. Accepted in the Rocky Mountain Journal of Mathematics

Scientific paper

Bounded orbit injection equivalence is an equivalence relation defined on minimal free Cantor systems which is a candidate to generalize flip Kakutani equivalence to actions of the Abelian free groups on more than one generator. This paper characterizes bounded orbit injection equivalence in terms of a mild strengthening of Rieffel-Morita equivalence of the associated C*-crossed-product algebras. Moreover, we construct an ordered group which is an invariant for bounded orbit injection equivalence, and does not agrees with the K\_0 group of the associated C*-crossed-product in general. This new invariant allows us to find sufficient conditions to strengthen bounded orbit injection equivalence to orbit equivalence and strong orbit equivalence.

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