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arXiv 1301.5745math.COmath.DSmath.GN
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中心集与代换动力系统

Central sets and substitutive dynamical systems

Marcy Barge, Luca Q. Zamboni

摘要:

本文建立了中心集与Pisot型不可约本原置换的不动点的强重合猜想之间的一个新的联系。Furstenberg首先利用拓扑动力学的概念引入了中心集,它构成了$\nats$的一类特殊子集,具有很强的组合性质:每个中心集包含任意长的等差数列,以及齐次线性方程的所有分块正则系统的解。本文给出了斯通-切赫紧化$β\nats .$中强重合条件用中心集和极小幂等超滤子表示的一个等价形式.这为解决平铺理论中的一个著名猜想--Pisot代换猜想提供了一种新的算法途径.本文的结果依赖于不同数学领域之间的相互作用,其中一些以前没有直接联系:它们包括词的组合学的一般理论,抽象计数系统,平铺,拓扑动力学和$\nats.$的斯通-切赫紧化的代数/拓扑性质

英文摘要:

In this paper we establish a new connection between central sets and the strong coincidence conjecture for fixed points of irreducible primitive substitutions of Pisot type. Central sets, first introduced by Furstenberg using notions from topological dynamics, constitute a special class of subsets of $\nats$ possessing strong combinatorial properties: Each central set contains arbitrarily long arithmetic progressions, and solutions to all partition regular systems of homogeneous linear equations. We give an equivalent reformulation of the strong coincidence condition in terms of central sets and minimal idempotent ultrafilters in the Stone-Čech compactification $β\nats .$ This provides a new arithmetical approach to an outstanding conjecture in tiling theory, the Pisot substitution conjecture. The results in this paper rely on interactions between different areas of mathematics, some of which had not previously been directly linked: They include the general theory of combinatorics on words, abstract numeration systems, tilings, topological dynamics and the algebraic/topological properties of Stone-Čech compactification of $\nats.$

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