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- W2994621635 abstract "For $beta > 1$, a sequence $(c_n)_{n geq 1} in mathbb{Z}^{mathbb{N}^+}$ with $0 leq c_n < beta$ is the emph{beta expansion} of $x$ with respect to $beta$ if $x = sum_{n = 1}^infty c_nbeta^{-n}$. Defining $d_beta(x)$ to be the greedy beta expansion of $x$ with respect to $beta$, it is known that $d_beta(1)$ is eventually periodic as long as $beta$ is a Pisot number. It is conjectured that the same is true for Salem numbers, but is only currently known to be true for Salem numbers of degree 4. Heuristic arguments suggest that almost all degree 6 Salem numbers admit periodic expansions but that a positive proportion of degree 8 Salem numbers do not. In this paper, we investigate the degree 6 case. We present computational methods for searching for families of degree 6 numbers with eventually periodic greedy expansions by studying the co-factors of their expansions. We also prove that the greedy expansions of degree 6 Salem numbers can have arbitrarily large periods. In addition, computational evidence is compiled on the set of degree 6 Salem numbers with $text{trace}(beta) leq 15$. We give examples of numbers with $text{trace}(beta) leq 15$ whose expansions have period and preperiod lengths exceeding $10^{10}$, yet are still eventually periodic." @default.
- W2994621635 created "2019-12-26" @default.
- W2994621635 creator A5025335205 @default.
- W2994621635 date "2019-12-22" @default.
- W2994621635 modified "2023-09-27" @default.
- W2994621635 title "On the co-factors of degree 6 Salem number beta expansions" @default.
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