Array ( [0] => Array ( [title] => L25A [link] => https://www.youtube.com/embed/exRevsiQuPk ) [1] => Array ( [title] => L25B [link] => https://www.youtube.com/embed/jP8-uSaANQE ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - Lecture 25 | (Interlude) Local stability of ODE periodic orbits