Two bifurcation sets arising from the beta transformation with a hole at 0
Two bifurcation sets arising from the beta transformation with a hole at 0
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由 0 处有孔的 beta 变换产生的两个分叉集
DOI:
10.1016/j.indag.2020.03.001
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Baker S
中科院分区:
文献类型:
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作者:
Baker S
Abstract Given β∈(1, 2], the β-transformation T β: x↦ β x (mod 1) on the circle [0, 1) with a hole [0, t) was investigated by Kalle et al.(2019). They described the set-valued bifurcation set E β≔{t∈[0, 1): K β (t′)≠ K β (t)∀ t′> t}, where K β (t)≔{x∈[0, 1): T β n (x)≥ t∀ n≥ 0} is the survivor set. In this paper we investigate the dimension bifurcation set ℬ β≔{t∈[0, 1): dim H K β (t′)≠ dim H K β (t)∀ t′> t}, where dim H denotes the Hausdorff dimension. We show that if β∈(1, 2] is a multinacci number then the two bifurcation sets ℬ β and E β coincide. Moreover we give a complete characterization of these two sets. As a corollary of our main result we prove that for β a multinacci number we have dim H (E β∩[t, 1])= dim H K β (t) for any t∈[0, 1). This confirms a conjecture of Kalle et al. for β a multinacci number.