Weakly recurrent and almost periodic points inβG

[摘要] LetGbe a group. We will study the relationship betweenAGandWRG. In Nassar [1] it has been shown that ifGis a nontorsion group, thenAG⫋RG. In this paper we will show that ifGcontains a subsetAsuch thatK.Ais not left thick for each finite setKandAis not a finite union of thin sets, thenAG⫋WRG.

[学科分类] 数学（综合）