Resumen de On groups whose subgroups are closed in the profinite topology

Derek J. S. Robinson, Alessio Russo, G. Vincenzi

• Abstract A group is called extended residually finite (ERF) if every subgroup is closed in the profinite topology. The ERF-property is studied for nilpotent groups, soluble groups, locally finite groups and FC-groups. A complete characterization is given of FC-groups which are ERF.