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树映射的ω-极限集与湍流
引用本文:孙太祥.树映射的ω-极限集与湍流[J].数学学报,2002,45(2):253-260.
作者姓名:孙太祥
作者单位:汕头大学数学所,广东,汕头,515063;中山大学数学系广,东广州,510275
基金项目:国家自然科学基金资助项目(19961001),广西科学基金资助项目(0135027)
摘    要:设T是个树,f:T→T是个连续自映射, n是T的端点数,x∈T.本文证明:(1)如果存在z∈ω(x,f)∩F(f),使z是ω(x,f)的一个单侧聚点,那么一定存在r∈Nn-1,使fr含有湍流;(2)如果ω(x,f)是个含有不动点的无穷集,那么必存在r∈Nn,使fr含有湍流.

关 键 词:树映射  单侧聚点  ω-极限集  湍流
文章编号:0583-1431(2002)02-0253-08
修稿时间:2000年3月20日

ω-Limit Sets and Turbulent of Tree Maps
SUN Tai Xiang.ω-Limit Sets and Turbulent of Tree Maps[J].Acta Mathematica Sinica,2002,45(2):253-260.
Authors:SUN Tai Xiang
Institution:SUN Tai Xiang (Institute of Mathematics, Shantou University, Shantou 515063, P. R. China) (Department of Mathematics, Zhongshan University, Guangzhou 510275, P. R. China)
Abstract:Let T be a tree, f: T → T be a continuous self-map, n be the number of the end points of T, and x ∈ T. In this paper, we prove that: (1) if there exists z ∈ ω(x, f) ∩ F(f) such that z is an unilateral accumulation point of ω(x, f), then there etists r ∈ Nn-1 such that fr has turbulent, (2) if ω(x, f) is an infinite set having the fixed points, then there exists r ∈ Nn such that fr has turbulent.
Keywords:Tree map  Unilateral accumulation point  ω-limit set  Turbulent
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