Random Series in Powers of Algebraic Integers: Hausdorff Dimension of the Limit Distribution

نویسنده

  • STEVEN P. LALLEY
چکیده

We study the distributions θ,p of the random sums 3 " ε n θn, where ε " , ε # ,... are i.i.d. Bernoulli-p and θ is the inverse of a Pisot number (an algebraic integer β whose conjugates all have moduli less than 1) between 1 and 2. It is known that, when p ̄ .5, θ,p is a singular measure with exact Hausdorff dimension less than 1. We show that in all cases the Hausdorff dimension can be expressed as the top Lyapunov exponent of a sequence of random matrices, and provide an algorithm for the construction of these matrices. We show that for certain β of small degree, simulation gives the Hausdorff dimension to several decimal places.

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تاریخ انتشار 1995