On completion groups that are not complete and infinite towers of profinite groups
We investigate profinite completions of non-strongly complete profinite groups. We present and study the tower of profinite completions. Furthermore, we study how far a non-strongly complete profinite group can be from being strongly complete, i.e. how many non-open finite-index subgroups it admits.
תאריך עדכון אחרון : 16/12/2019