2022-03-18から1日間の記事一覧
計算過程 $$\dfrac{\partial^2}{\partial x^2}+\dfrac{\partial^2}{\partial y^2}+\dfrac{\partial^2}{\partial z^2}$$ $$x=r\sin{\theta}\cos{\phi}$$ $$y=r\sin{\theta}\sin{\phi}$$ $$z=r\cos{\theta}$$ $(0\leq \theta\leq \pi,0\leq \phi\lt 2\pi,0\leq…