weak fixed point property

Using geometric properties to deal with the fixed point property of nonexpansive mapping in Banach spaces have being highly develpmented since Kirk proved that a Banach space with normal structure have weak fixed point property in 1965.
自從1965年，W. A. Kirk證明具有正規(guī)結(jié)構(gòu)的Banach空間具有弱不動點性質(zhì)10以來，利用Banach空間的空間性質(zhì)研究非擴(kuò)張映射的不動點性質(zhì)得到了迅速的發(fā)展。