Analysis · Oct 6, 2026

Arithmetic classification and non-Pisot singularity for Bernoulli convolutions

Classifies singular and absolutely continuous unbiased Bernoulli convolutions for every λ∈(0,1)\lambda\in(0,1) by an infinite, one-sided approximation condition using explicit finite sets of algebraic units. It also proves singularity at reciprocals of every quartic Salem number in (1,2)(1,2), giving examples beyond reciprocal Pisot parameters.

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