The AORC monthly seminar of this month will be held on May 26 (Friday). - Time : May 26 (Fri), 2:00 pm - 5:00 pm - Place : AORC Seminar Room - Speakers : (Group 1) : Hojin Chu (Seoul National University) The Friendship Theorem in a digraph version (Group 1) : Donghyun Kim (Seoul National University) Combinatorics of the modified labeled Dyck paths (Group 3) : Kyeongseok Min (AORC) Generalized hecke operator