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arXiv math/0402144math.DS
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Gibbs测度在sofic子移位上的有限型逼近

Finite type approximations of Gibbs measures on sofic subshifts

J. -R. Chazottes, L. Ramirez, E. Ugalde

摘要:

考虑定义在全移位$A^\nn$上的Hölder连续势$ϕ$,其中$A$是有限字母表。令$X\subset A^\nn$为指定的sofic子移位。众所周知,在与$ϕ$相关联的$X$上存在唯一的吉布斯测度$μ_ϕ$。此外,还存在一个自然的有限型$(X_m)$子移位嵌套序列收敛到sofic子移位$X$ .我们可以将吉布斯测度序列$(μ_ϕ^m)$与该序列相关联。在本文中,我们证明了这些措施弱指数速度收敛到$μ_ϕ$(在经典的距离度量弱拓扑)。我们还建立了$μ_ϕ$的强混合性质(确保弱Bernoulicity)。最后证明了$μ_ϕ^m$的测度熵指数快速收敛到$μ_ϕ$的测度熵.我们指出如何将我们的结果扩展到更一般的子移位和潜力。我们强调,我们使用基本的代数工具(迭代矩阵的压缩特性)和符号动力学。

英文摘要:

Consider a Hölder continuous potential $ϕ$ defined on the full shift $A^\nn$, where $A$ is a finite alphabet. Let $X\subset A^\nn$ be a specified sofic subshift. It is well-known that there is a unique Gibbs measure $μ_ϕ$ on $X$ associated to $ϕ$. Besides, there is a natural nested sequence of subshifts of finite type $(X_m)$ converging to the sofic subshift $X$. To this sequence we can associate a sequence of Gibbs measures $(μ_ϕ^m)$. In this paper, we prove that these measures weakly converge at exponential speed to $μ_ϕ$ (in the classical distance metrizing weak topology). We also establish a strong mixing property (ensuring weak Bernoullicity) of $μ_ϕ$. Finally, we prove that the measure-theoretic entropy of $μ_ϕ^m$ converges to the one of $μ_ϕ$ exponentially fast. We indicate how to extend our results to more general subshifts and potentials. We stress that we use basic algebraic tools (contractive properties of iterated matrices) and symbolic dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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