Pre-image pressure and invariant measures

Pre-image pressure and invariant measures
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原像压力和不变测量

DOI:
10.1017/s0143385706000812
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发表时间:
2007-02
期刊:
Ergodic Theory & Dyanmical Systems
影响因子:
--
通讯作者:
Fanping Zeng
Fanping Zeng
中科院分区:
其他
文献类型:
--
作者:
Kesong Yan;Gengrong Zhang;Fanping Zeng

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我们定义并研究了一种新的不变量——预像压力及其与不变量测度的关系。更准确地说,对于给定的动力系统$(X,f)$(其中$X$是紧致度量空间,$f$是从$X$到自身的连续映射)和$\varphi\in C(X,R)$ ($X$上的实值连续函数空间),我们证明了预像压力$P_{\rm pre}(f,\varphi),\ P_{\rm pre}(f,\varphi) = \sup_{\mu \in \mathcal{M}(f)} \{ h_{{\rm pre},\mu}(f) + \int \varphi \,d\mu\}$的变分原理,其中$h_{{\rm pre},\mu}(f)$是预像熵(w.c。Cheng和S. Newhouse。好的。那个。&动力。Sys.25(2005), 1091-1113)和$\mathcal{M}(f)$是$f$的不变测度集。此外,我们还证明了预像压力决定了不变性测度,并给出了预像压力在平衡态中的一些应用。
We define and study a new invariant called pre-image pressure and its relationship with invariant measures. More precisely, for a given dynamical system $(X,f)$ (where $X$ is a compact metric space and $f$ is a continuous map from $X$ to itself) and $\varphi\in C(X,R)$ (the space of real-valued continuous functions on $X$), we prove a variational principle for pre-image pressure $P_{\rm pre}(f,\varphi),\ P_{\rm pre}(f,\varphi) = \sup_{\mu \in \mathcal{M}(f)} \{ h_{{\rm pre},\mu}(f) + \int \varphi \,d\mu\}$, where $h_{{\rm pre},\mu}(f)$ is the pre-image entropy (W.-C. Cheng and S. Newhouse. Ergod. Th. & Dynam. Sys.25 (2005), 1091–1113) and $\mathcal{M}(f)$ is the set of invariant measures of $f$. Moreover, we also prove that pre-image pressure determines the invariant measures and give some applications of pre-image pressure to equilibrium states.
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