Array ( [0] => Array ( [title] => L31A [link] => https://www.youtube.com/embed/nnPfNjCkeIg ) [1] => Array ( [title] => L31B [link] => https://www.youtube.com/embed/QR49uwpyIUo ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - Lecture 31 | Stationary symmetry breaking bifurcation; Example: Semilinear elliptic equations