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International Journal of Mathematics and Mathematical Sciences - Volume 11 1988, Issue 1, Pages 37-42

Department of Mathematics, Acadia University, N.S. BOP 1XO, Wolfville, Canada

Received 23 May 1986; Revised 18 November 1986

Copyright © 1988 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Let G be a group. We will study the relationship between AG and WRG. In Nassar 1 it has been shown that if G is a nontorsion group, then AG⫋RG. In this paper we will show that if G contains a subset A such that K.A is not left thick for each finite set K and A is not a finite union of thin sets, then AG⫋WRG.

Autor: Mostafa Nassar

Fuente: https://www.hindawi.com/


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