Array ( [0] => Array ( [title] => L25A [link] => https://www.youtube.com/embed/aiRDEFChe48 ) [1] => Array ( [title] => L25B [link] => https://www.youtube.com/embed/cmCZt3YXcyk ) [2] => Array ( [title] => L25C [link] => https://www.youtube.com/embed/471PLvEZ_R0 ) [3] => Array ( [title] => L25D [link] => https://www.youtube.com/embed/MFYDDmcXC8w ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第25R講 線性分式變換 (莫比烏斯變換)、交比、黎曼球上的自同構