數理方程：二階線性偏微分方程的分類和標准式
更新：9 APR 2016 ========方法======== 對於任意的二元二階齊次線性偏微分方程， \(a_{11}\dfrac{\partial^2u}{\partial x^2}+2a_{12}\dfrac{\partial^2 u}{\partial x\partial y ...
花費 7 ms
更新：9 APR 2016 ========方法======== 對於任意的二元二階齊次線性偏微分方程， \(a_{11}\dfrac{\partial^2u}{\partial x^2}+2a_{12}\dfrac{\partial^2 u}{\partial x\partial y ...