Set inner amenability for semigroups

Set inner amenability for semigroups

In this paper, we present a new concept of inner amenability for a non-empty arbitrary subset A of discrete semigroup S called A-inner amenablility. This condition is considerably weaker than ordinary inner amenability. Further, we give some equivalent conditions between this version of inner amenability and Flner'scondition.                                                                                                                                                                                                                                                                                                                                               

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  • M. M. Day, Amenable semigroups,