글쓴이: clearmg (clearmg)
날 짜: Fri Oct 13 10:50:56 2006
제 목: Design에 관하여..
A system S(n) of n points, arranged into triples in such a way that any two po
ints lie in just one triple, is possible only when n≡1 or 3 (mod 6); for exam
ple, when n=7, we obtain the following seven triples:
① ② ③ ④ ⑤ ⑥ ⑦
1 2 3 4 5 6 7
2 3 4 5 6 7 1
4 5 6 7 1 2 3
이 말 뜻을 알려주세요~
또, projective plan, Fano plan도 알려주세요~
