Array ( [0] => Array ( [title] => L22A [link] => https://www.youtube.com/embed/Ko-QOY4Ug_c ) [1] => Array ( [title] => L22B [link] => https://www.youtube.com/embed/ElOdn2H5vAg ) [2] => Array ( [title] => L22C [link] => https://www.youtube.com/embed/mWy0gVdFtbo ) [3] => Array ( [title] => L22D [link] => https://www.youtube.com/embed/he-siBVvjug ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第22講 Proving Set Identities