Homotopy algebras and non-commutative geometry. - Cho Cheolhyun Seoul National University(http://www.mathnet.or.kr/new_sub04/sub04_01_01.php?no=4232&ko_name=%EC%A1%B0%EC%B2%A0%ED%98%84&paper_id=&key_name=%EC%A1%B0%EC%B2%A0%ED%98%84&key_locale=in) 아산온천호텔