| [ QuizWit ] in KIDS 글 쓴 이(By): iLUSiON (띠띠빤쮸) 날 짜 (Date): 2005년 10월 12일 수요일 오전 01시 41분 39초 제 목(Title): Re: 선 열결하기 what on earth are you using Euler characteristic for !!!! it's simpler than that. i always tell my students never to use formula. you should be spanked for using formula ^^ If you connect A,B and 1,2,3 the basic configuration is 2 adjacent triangles which partition R^2 into 3 disjoint sets. there is only 3 ways to put C into 3 disjoint sets. Whataever you do, because they are disjoint, there is no focking way to draw lines without crossing. iLUSiON - le plus grand de tous http://cyworld.nate.com/ilusion |