Let (X, f ) be a topological dynamical system, where X is a nonempty compact and metrizable space with the metric d and f :X →X is a continuous map. For any integer n≥2, denote the product space by X(n)=X ...Let (X, f ) be a topological dynamical system, where X is a nonempty compact and metrizable space with the metric d and f :X →X is a continuous map. For any integer n≥2, denote the product space by X(n)=X · · · × X| {z }n times . We say a system (X, f ) is generally distributionally n-chaotic if there exists a residual set D ?X(n) such that for any point x=(x1, · · · , xn)∈D, lim inf k→∞#({i:0≤i≤k-1, min{d(fi(xj), fi(xl)):1≤j 6=l≤n}〈δ0}) k=0 for some real numberδ0〉0 and lim sup k→∞#({i:0≤i≤k-1, max{d(fi(xj), fi(xl)):1≤j 6=l≤n}〈δ}) k=1 for any real number δ 〉 0, where #(·) means the cardinality of a set. In this paper, we show that for each integer n ≥ 2, there exists a system (X,σ) which satisfies the following conditions: (1) (X,σ) is transitive;(2) (X,σ) is generally distributionally n-chaotic, but has no distributionally (n+1)-tuples;(3) the topological entropy of (X,σ) is zero and it has an IT-tuple.展开更多
基金supported by the NNSF of China(11071084,11026095 and 11201157)FDYT of Guangdong Province(2012LYM 0133)
文摘Let (X, f ) be a topological dynamical system, where X is a nonempty compact and metrizable space with the metric d and f :X →X is a continuous map. For any integer n≥2, denote the product space by X(n)=X · · · × X| {z }n times . We say a system (X, f ) is generally distributionally n-chaotic if there exists a residual set D ?X(n) such that for any point x=(x1, · · · , xn)∈D, lim inf k→∞#({i:0≤i≤k-1, min{d(fi(xj), fi(xl)):1≤j 6=l≤n}〈δ0}) k=0 for some real numberδ0〉0 and lim sup k→∞#({i:0≤i≤k-1, max{d(fi(xj), fi(xl)):1≤j 6=l≤n}〈δ}) k=1 for any real number δ 〉 0, where #(·) means the cardinality of a set. In this paper, we show that for each integer n ≥ 2, there exists a system (X,σ) which satisfies the following conditions: (1) (X,σ) is transitive;(2) (X,σ) is generally distributionally n-chaotic, but has no distributionally (n+1)-tuples;(3) the topological entropy of (X,σ) is zero and it has an IT-tuple.