Bull. Korean Math. Soc. 2016; 53(1): 39-48
Printed January 31, 2016
https://doi.org/10.4134/BKMS.2016.53.1.39
Copyright © The Korean Mathematical Society.
Massoud Amini, Alireza Medghalchi, and Fouad Naderi
Tarbiat Modares University, Kharazmi University, Tarbiat Modares University
In this paper we extend Takahashi's fixed point theorem on discrete semigroups to general semi-topological semigroups. Next we define the semi-asymptotic non-expansive action of semi-topological semigroups to give a partial affirmative answer to an open problem raised by A.T-M. Lau.
Keywords: non-expansive mappings, normal structure, semi-topological semigroups, amenable, left reversible
MSC numbers: Primary 22A22; Secondary 46L05
1997; 34(3): 385-394
© 2022. The Korean Mathematical Society. Powered by INFOrang Co., Ltd