用来求解Ritz-Galerkin问题的matlab與mathematica程序-Used to solve the problem of Ritz-Galerkin procedure matlab and mathematica

用Ritz-Galerkin方法解边值问题： u +u=-x,0<x<1, u(0)=u(1)=0,精确解为u*(x)=sinx/sin1-x； 得出结果与精确解作比较，画出误差分析图-With the Ritz-Galerkin method to solve the boundary value problem: u' ' + u =- x, 0 <x<1, u(0)=u(1)=0,精确解为u*(x)=sinx/sin1-x； 得出结果

用ritz-galerkin 法解边值问题，matlab程序。(The Ritz-Galerkin method is used to solve the boundary value problem, the matlab program.)