偏微分方程数值解- 这是矩阵的紧致存储及在紧致存储的矩阵上用共轭梯度(CG)方法解Poisson方程的实现, gcc mingw 3.4.4下通过-Numerical solution of partial differential equations- this is the matrix of the compact storage and storage in a compact matrix conjugate gradient (CG) method to solve Poisso