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The Pisot conjecture for $\unicode[STIX]{x1D6FD}$-substitutions

Published online by Cambridge University Press:  22 September 2016

MARCY BARGE
MARCY BARGE*
Affiliation:
Department of Mathematics, Montana State University, Bozeman, MT 59717-0240, USA email [email protected]
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Abstract

We prove the Pisot conjecture for $\unicode[STIX]{x1D6FD}$-substitutions: if $\unicode[STIX]{x1D6FD}$ is a Pisot number, then the tiling dynamical system $(\unicode[STIX]{x1D6FA}_{\unicode[STIX]{x1D713}_{\unicode[STIX]{x1D6FD}}},\mathbb{R})$ associated with the $\unicode[STIX]{x1D6FD}$-substitution has pure discrete spectrum. As corollaries: (1) arithmetical coding of the hyperbolic solenoidal automorphism associated with the companion matrix of the minimal polynomial of any Pisot number is almost everywhere one-to-one; and (2) all Pisot numbers are weakly finitary.

Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 38 , Issue 2 , April 2018 , pp. 444 - 472
Copyright
© Cambridge University Press, 2016 

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