Array ( [0] => Array ( [title] => L15A [link] => https://www.youtube.com/embed/pSA9zS_YQC4 ) [1] => Array ( [title] => L15B [link] => https://www.youtube.com/embed/AsdhtYy2688 ) [2] => Array ( [title] => L15C [link] => https://www.youtube.com/embed/j4jg8VDfrjs ) [3] => Array ( [title] => L15D [link] => https://www.youtube.com/embed/SJ2da7TGCv8 ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第15R講 調和函數的平均值定理和最大值原理、平均值性質、Dirichlet問題、Poisson積分公式