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Logistic映射及其扰动族的双曲性
引用本文:吴双民.Logistic映射及其扰动族的双曲性[J].苏州大学学报(医学版),2009,25(2):31-35.
作者姓名:吴双民
作者单位:苏州大学,数学科学学院,江苏,苏州,215006  
摘    要:首先研究一维logstic映射fu(x)=ux(1-x),在参数u∈(4,4+∈)的动力学性质,其中∈充分小,利用在临界点的某个领域外的一致扩张性,以及进入临界点领域后导数值虽然有所减少,但在随后的有限次迭代后其导数值得到弥补,证明其正向不变集Ku={x∈I:fu^n(x)∈I,A↓n≥0}的一致双曲性,然后研究一维logistic映射族的C^2小扰动族,证明了对于gu,E←u^*,u^*~4,当u∈(u^*,u^*+∈)时,Kgu={x∈I:gu^n(x)∈I,A↓n≥0}是一致双曲的.

关 键 词:Logistic映射  双曲集  扰动

The hyperbolicity of logistic map and its perturbation
Wu Shuangmin.The hyperbolicity of logistic map and its perturbation[J].Journal of Suzhou University(Natural Science),2009,25(2):31-35.
Authors:Wu Shuangmin
Institution:School of Mathematic Science;Suzhou Univ.;Suzhou 215006;China
Abstract:We consider the one-parameter families of one dimensional mapsfu(x)=ux(1-x),X∈I=0,1], u∈(4,4+∈)We prove that the set Ku={x∈I:fu^n(x)∈I,A↓n≥0}is a hyperbolic set for ∈ sufficiently small. Moreover if gu, is the C^2 perturbation family of logistic map, then the set Kgu={x∈I:gu^n(x)∈I,A↓n≥0} is also hyperbolic.
Keywords:logistic maps  hyperbolicity  perturbation
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