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. 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,
liminfk→∞#({i : 0 ≤ i ≤ k − 1,min{d(f i(xj), f i(xl)) : 1 ≤ j ≠ l ≤ n} < δ0})/k= 0
for some real number δ0 > 0 and
limsupfk→∞#({i : 0 ≤ i ≤ k − 1,max{d(f i(xj), f i(xl)) : 1 ≤ j ≠ l ≤ n} < δ0})/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.
《数学物理学报》2023年度优秀论文、 审稿人、编委的奖励通知