首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Prographes sylvestres et groupes profinis presque libres
Authors:Bruno Deschamps  Ivan Suarez Atias
Institution:1.Département de Mathématiques,Université du Maine,Le Mans cedex 9,France
Abstract:In this article we want to give an analogous in the profinite case to the following theorem: an abstract group is free if and only if it acts freely on a tree. In a first time we define a combinatory object, the protrees, which are particular inductive systems extracted from projective systems of graphs. Then we define a notion of profinite action. These objects allow us to give the following analogous: a profinite group contains a dense abstract free subgroup if and only if it acts profreely on a protree.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号