On Intervals, Transitivity = Chaos

On Intervals, Transitivity = Chaos
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DOI:
10.1080/00029890.1994.11996955
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发表时间:
1994-04
影响因子:
0.5
通讯作者:
M. Vellekoop;Raoul M Berglund
M. Vellekoop;Raoul M Berglund
中科院分区:
数学4区
文献类型:
--
作者:
M. Vellekoop;Raoul M Berglund

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在[2]中,Banks等人证明了在任何度量空间V中(1)和(2)蕴涵(3),在[3]中,Assaf IV和Gadbois证明了对于一般映射,这是唯一的冗余:(1)和(3)不蕴涵(2),(2)和(3)不蕴涵(1)。但是如果我们把注意力限制在区间上的映射上,就可以得到一个更强的结果:命题。设I是一个不一定有限的区间,f:I-I是一个连续的拓扑可迁映射.则(1)f的周期点在I中是稠密的;(2)f对初始条件有敏感的依赖性。
In [2], Banks et al. prove that (1) and (2) imply (3) in any metric space V, and in [3] Assaf IV and Gadbois show that for general maps this is the only redundancy:(1) and (3) do not imply (2), and (2) and (3) do not imply (1). But if we restrict our attention to maps on an interval a stronger result can be obtained:Proposition. Let I be a, not necessarily finite, interval and f: I-I a continuous and topologically transitive map. Then (1) the periodic points off are dense in I and (2) f has sensitive dependence on initial conditions.