science4
http://science4.2ch.net/test/read.cgi/math/1159096723/243 2007/01/01 13:08:31
http://science4.2ch.net/test/read.cgi/math/1159096723/248 2007/01/02 00:25:46
http://science4.2ch.net/test/read.cgi/math/1159096723/256 2007/01/02 22:45:55