摘 要:
设G为除含一个圆周束外不含其它圈的有限图,证明了连续自映射f:G→G的熵为零当且仅当存在k≤[(Edg(G)+End(G)+3Cir(G)+3)/ 2]个不同的奇数n1,n2,...,nk,使得Per(f)真包含∪ki=1 ∪∞j=1{ni2j},其中Edg(G)、End(G)、Cir(G)分别表示G的边数、端点数、圈数.[著者文摘]

文章出处:
《华南师范大学学报:自然科学版》-2006年1期 -43-47页
Journal of South China Normal University(Natural Science Edition)
分 类 号:
文献标识码:
A
文章编号:
1000-5463(2006)01-0043-05
[参考文献]
A DESCRIPTION TO THE TOPOLOGICAL ENTROPY OF A CONTINUOUS MAP OF A CLASS OF FINITE GRAPH
WU Chao - lin, Lü Jie ( School of Mathematical Sciences, South China Normal University, Guangzhou 51063 1, China )
Abstract:
Let G be a graph which contains no simple closed curve except a wedge of circles. It is proved that a continuous mapf:G→G has zero topological entropy if and only if there exist at most k≤[ ( Edg(G) + End(G) + 3Cir(G) +3)/2] different odd numbers k n1 ,n2,...,nk, such that Per(f) belong to ∪ki=1 ∪∞j=1{ni2j} ,where Edg(G) is number of edges of G , End(G) is the number of end points of G,and Cir(G) is the number of circles of G.[著者文摘]
Key words:
graph; topological entropy ; inverse limit; period
收稿日期: 2005-09-08
基金资助:
国家自然科学基金资助项目(10471049)

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