Decimation and interleaving operations in one-sided symbolic dynamics
Decimation and interleaving operations in one-sided symbolic dynamics
复制标题
单侧符号动力学中的抽取和交织运算
DOI:
10.1016/j.aam.2020.102160
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发表时间:
2021
影响因子:
1.1
通讯作者:
Slonim, Daniel J.
中科院分区:
文献类型:
--
作者:
Abram, William C.;Lagarias, Jeffrey C.;Slonim, Daniel J.
This paper studies subsets of one-sided shift spaces on a finite alphabet. Such subsets arise in symbolic dynamics, in fractal constructions, and in number theory. We study a family of decimation operations, which extract subsequences of symbol sequences in infinite arithmetic progressions, and show these operations are closed under composition. We also study a family of n-ary interleaving operations, one for each n≥ 1. Given subsets X 0, X 1,..., X n− 1 of such a shift space, the n-ary interleaving operation produces a set whose elements combine individual elements x i, one from each X i, by interleaving their symbol sequences in arithmetic progressions (mod n). We determine algebraic relations between decimation and interleaving operations and the shift map. We study set-theoretic n-fold closure operations X↦ X [n], which interleave decimations of X of modulus level n. A set is n-factorizable if X= X [n]. The n-fold interleaving operations are closed under composition and are idempotent. To each X we assign the set N (X) of all values n≥ 1 for which X= X [n]. We characterize the possible sets N (X) as nonempty sets of positive integers that form a distributive lattice under the divisibility partial order and are downward closed under divisibility. We show that all sets of this type occur. We introduce a class of weakly shift-stable sets and show that this class is closed under all decimation, interleaving, and shift operations. We study two notions of entropy for subsets of the full one-sided shift and show that they coincide for weakly shift-stable X, but can be different in general. We give a formula for entropy of interleavings of weakly shift-stable sets in terms of individual entropies.
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DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
M. Dokuchaev;R. Exel
通讯作者:
R. Exel
影响因子:
1.1
作者:
W. Abram;J. Lagarias
通讯作者:
J. Lagarias
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
P. Cartier
通讯作者:
P. Cartier
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
W. Abram;J. Lagarias;D. Slonim
通讯作者:
D. Slonim
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
J. Lagarias
通讯作者:
J. Lagarias