摘要
设f:X→X是紧连通多面体的自映射,A是X的非空闭子集,我们将在本文中讨论这样一个问题,是否存在一个同伦于f的映射g:X→X使得g的不动点集Fixg等于A.我们给出了这样的映射g存在的必要条件,并且说明此条件是容易验证的.同时得到了一些充分条件.
Let f X Xbe a selfmap of a compact connected polyhedron and A anonempty closed subset of X.In this paper, we shall deal with the question whetherthere is a map g: X→X homotopic to f such that the fixed point set Fixg of g equals toA. We obtain some necessary conditions for the existence of such map g.It is shown thatthese conditions are easy to be checked, and several sufficent conditions are given.
出处
《辽宁大学学报(自然科学版)》
CAS
1995年第A00期32-37,46,共7页
Journal of Liaoning University:Natural Sciences Edition
基金
辽宁大学青年科学基金
关键词
不动点集
尼尔森数
紧连通多面体
自映射
Fixed point set,Nielsen ntimber,local cut point, Jiang group.