(1) Faculty of Mathematical Sciences, Ferdowsi University of Mashhad, Mashhad, 91775-1159, Iran;(2) Department of Mathematics, Faculty of Sciences, University of Kashan, Kashan, 3125, Iran
Abstract:
Let be a variety of groups defined by the set of laws V. In this paper we study the concept of -isologism of groups in terms of -extensions and their connections with the Baer-invariant of groups are also discussed.AMS Subject Classification (2000): primary 20F14, 20F19, secondary 20E10