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关于非自治动力系统中的h-极小覆盖
引用本文:赵佳琪,王延庚.关于非自治动力系统中的h-极小覆盖[J].纯粹数学与应用数学,2013(2):179-184.
作者姓名:赵佳琪  王延庚
作者单位:西北大学数学系,陕西西安710127
基金项目:陕西省自然科学基金(2012JM1016).
摘    要:设(X,d1,f1∞)与(Y ,d2,g1,∞)为两个非自治动力系统,h是从(X,d1,f.∞)到(Y,d2,g1∞)的拓扑半共轭.通过对自治动力系统中的h一极小覆盖的研究,本文得到了以下结论:1)对于任意的Y∈Y及X∈h-1(y),orb(x,f1∞)被h映射为orb(y,g1∞),w(x,f1∞)被h映射为w(y,g1∞);2)在(X,d1,f1∞)中引入关于拓扑半共轭的h-极小覆盖的定义,证明了h一极小覆盖的存在性;3)对于任意的XEX和Y∈Y,在(w(z,f1∞),f1∞。(x,f1,∞)与(w(y,g∞),g1,∞(y,g1∞))均构成原系统的子系统的前提下,R(f1∞)被h映射为R(g1∞).这些结论丰富了非自治动力系统的内容.

关 键 词:自治动力系统  非自治动力系统  h-极小覆盖  拓扑共轭  拓扑半共轭

On h-minimal covering of non-autonomous dynamical systems
Zhao Jiaqi,Wang Yangeng.On h-minimal covering of non-autonomous dynamical systems[J].Pure and Applied Mathematics,2013(2):179-184.
Authors:Zhao Jiaqi  Wang Yangeng
Institution:(Department of Mathematics, Northwest University, Xian 710127, China)
Abstract:Let (X, dl, fl∞) and (Y, d2, g1∞) are non-autonomous discrete dynamical systems, (Y, d2, gl∞) is quasiconjugate to (X, dl,fl∞) via h : X -+ Y. By using the h-minimal covering of autonomous discrete dynamical systems, we can obtain the following resluts : 1) For any point y C Y, x E h-l(y), there are h(orb(x, fl∞)) = orb(y, gl∞) and h(w(x, fl∞)) = w(y, gl∞); 2) We define the h-minimal covering of non- autonomous discrete dynamical systems (X, dl, fl∞). In addition, the existence of the h-minimal covering is studied; 3) For any point x E X, y @ Y, while (w(x, fl∞), fl,ool(x,ii)) and (w(y, gl∞), gl∞l(u,gl∞)) are subsystems of the original systems, we have h(R(fl∞)) = R(gl∞). These conclusions enriched the contents of non-autonomous discrete dynamical systems.
Keywords:autonomous discrete dynamical system  non-autonomous discrete dynamical system  the h-minimal covering  topological conjugation  topological quasiconjugation
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