Array ( [0] => Array ( [title] => L11A [link] => https://www.youtube.com/embed/HrCE6RbdOkg ) [1] => Array ( [title] => L11B [link] => https://www.youtube.com/embed/TdY6hl-TqtI ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - Lecture 11 | Center manifolds(applications)