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数域中无\(\mathfrak{B}\)整数的内在遍历性

Intrinsic ergodicity for $\mathfrak{B}$-free integers in number fields

Francesco Cellarosi

arXiv 2607.11330首次发表:更新:

AI 中文总结

研究数域中无\(\mathfrak{B}\)整数的内在遍历性,证明相关子转移是内在遍历的,给出唯一最大熵测度。这是一维以上此类系统首个证明,依赖他人工作,还解决了相关情况,且给出基础刚性陈述的两个独立证明。

AI 中文摘要

设\(K\)是一个数域,其整数环为\(\mathscr{O}_K\),\(\mathfrak{B}\)是\(\mathscr{O}_K\)中的一个厄尔多斯理想族。我们证明了相关的无\(\mathfrak{B}\)子转移\((X_{\mathfrak{B}},(S_a)_{a\in\mathscr{O}_K})\)是内在遍历的:它承载着唯一的最大熵测度,我们明确地将其识别为\(\prod_{\mathfrak{b}\in\mathfrak{B}}\mathscr{O}_K/\mathfrak{b}\)上哈尔旋转的相对独立扩展。这是一维以上无\(\mathfrak{B}\)系统内在遍历性的首个证明,依赖于阿劳霍 - 戴梅克 - 库拉加 - 普日姆斯的工作。通过他们的约化,我们还解决了\(k\)自由和无\(\mathfrak{B}\)格点情况以及\(k\)自由数域情况。我们给出了基础刚性陈述的两个独立证明:一个通过单位点相对熵论证,另一个通过佩克纳诱导 - 分裂方案的精确平铺实现。

英文摘要

Let $K$ be a number field with ring of integers $\mathscr{O}_K$, and let $\mathfrak{B}$ be an Erdős family of ideals in $\mathscr{O}_K$. We prove that the associated $\mathfrak{B}$-free subshift $(X_{\mathfrak{B}},(S_a)_{a\in\mathscr{O}_K})$ is intrinsically ergodic: it carries a unique measure of maximal entropy, which we identify explicitly as a relatively independent extension of the Haar rotation on $\prod_{\mathfrak{b}\in\mathfrak{B}}\mathscr{O}_K/\mathfrak{b}$. This is the first proof of intrinsic ergodicity for $\mathfrak{B}$-free systems beyond dimension one, and relies on the work of Araújo--Dymek--Kułaga-Przymus. Via their reductions, we also settle the $k$-free and $\mathfrak{B}$-free lattice-point cases and the $k$-free number-field case. We give two independent proofs of the underlying rigidity statement: one through a single-site relative-entropy argument, and one through an exact-tiling realisation of Peckner's induce-and-split scheme.

Comments14 pages

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