On the congruence subgroup problem On the congruence subgroup problem Date Thu, 04/18/2013 - 12:00 andrei-rapinchuk Thu, 12/03/2020 - 21:50 Location Banff Research Station Video: http://www.birs.ca/events/2013/5-day-workshops/13w5019/videos/watch/201304181400-Rapinchuk.html