Regularity of aperiodic minimal subshifts

Regularity of aperiodic minimal subshifts
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非周期性最小子移的规律性

DOI:
10.1007/s13373-017-0102-0
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发表时间:
2018
影响因子:
1.2
通讯作者:
M. Steffens
M. Steffens
中科院分区:
数学2区
文献类型:
--
作者:
F. Dreher;M. Kesseböhmer;A. Mosbach;T. Samuel;M. Steffens

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在本世纪之交,Durand、Lagarias和Pleasants确定了要研究的极小子移位(及其高维类似物)的主要特征是线性重复、排斥和无能量。从那时起,人们引入和研究了这些特征的推广和推广,即-重复、-排斥和-有限()。我们建立了有限字母表上一般子移位的-排斥和-有限的等价性。进一步,我们研究了源于Grigorchuk无限2-群G的一族非周期极小子移位。特别地,我们证明了这些子移位提供的例子表明--排斥的(并因此-有限的)不等价于-重复的,for。我们还给出了这些子移位是-重复的、-排斥的(因此-有限的)的充要条件。此外,我们还得到了它们的复杂性函数的显式公式,并由此推论出它们是唯一遍历的。
At the turn of this century Durand, and Lagarias and Pleasants established that key features of minimal subshifts (and their higher-dimensional analogues) to be studied are linearly repetitive, repulsive and power free. Since then, generalisations and extensions of these features, namely-repetitive,-repulsive and-finite (), have been introduced and studied. We establish the equivalence of-repulsive and-finite for general subshifts over finite alphabets. Further, we studied a family of aperiodic minimal subshifts stemming from Grigorchuk’s infinite 2-groupG. In particular, we show that these subshifts provide examples that demonstrate-repulsive (and hence-finite) is not equivalent to-repetitive, for. We also give necessary and sufficient conditions for these subshifts to be-repetitive, and-repulsive (and hence-finite). Moreover, we obtain an explicit formula for their complexity functions from which we deduce that they are uniquely ergodic.
DOI: 10.1090/crmm/013
发表时间: 2000
影响因子: 4.5
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