¼­¿ï´ë ÀÛ¿ë¼Ò ¼¼¹Ì³ª 2015 Nov 27: Nhan-Phu Chung(Vietnam National Univ.); Fuglede-Kadison determinant and algebraic actions 2017 May 10: Nhan-Phu Chung(¼º±Õ°ü´ë); Rigidity of group actions