%0 Journal Article %T 正上密度回归点集的若干性质<br>Some properties of positive upper density recurrence points %A 曹 %A 毅 %A 吴晓荣 %J 福州大学学报(自然科学版) %D 2016 %R 10.7631/issn.1000-2243.2016.03.0401 %X 令X为紧致度量空间,f:X→X为连续映射,讨论正上密度回归点与支撑点的关系,并证明当正上密度回归点集稠密时,可迁系统等价于E系统.<br>Let X be a compact metric space and f:X→X a continuous onto maps. This paper discusses the relationships of the positive upper Banach density recurrence point and the support point,and proves that a topologically transitivity system is equivalent to a E-system when the set of positive upper Banach density recurrence points is dense %K E系统 支撑点 正上Banach密度回归点< %K br> %K E-system support point positive upper Banach density recurrence points %U http://xbzrb.fzu.edu.cn/ch/reader/view_abstract.aspx?file_no=201603020&flag=1