¼­¿ï´ë ÀÛ¿ë¼Ò ¼¼¹Ì³ª 1996 Jun 26: D. R. Farenick (Univ. of Regina); Matricial convexity in operator algebras 2002 Aug 23: D. R. Farenick (Univ. of Regina); Operator Convexity