摘要
本文通过引进完备度量空间X上两个自映射的拟弱交换的概念,把S.Sessa和B.Fisher在[1]中得到的主要定理3推广到拟弱交换的自映射的情形,它以[1]的定理3作为其特款,同时我们给出适当的例子以说明所作推广的意义.
By introducing the concept of quasi weak commutativity of two selfmappings in a complete metric space,we establish a common fixed point theorem for four selfmappings of a complete metric space.This result generalizes the main theorem 3 in and suitable examples are given.
出处
《杭州教育学院学报》
CAS
1998年第6期31-34,共4页
JOURNAL OF HANGZHOU EDUCATIONAL INSTITUTE
关键词
弱交换
拟弱交换
完备度量空间
上半连续
柯西序列
weak commutativity,quasi weak commutativity,complete metric space,upper semi continuous,Cauchy sequence.