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Re: simple PDE?
On Feb 12, 11:08 am, "Manuel G. Cerpa" <cerc... at gmail.com> wrote: > Hi members: > I need your help with this problem: > D[z[x,y],x] + D[z[x,y],y] + b*z[x,y] = 0, z[0,y]=1-Exp[-1000*y], z[x, > 0]=0, 0<x<1, y>0, b>0. > Using NDSolve with MethodOfLines, I have a error: mxst. > How solve it? > Best regards. Why don't you solve the equation symbolically to get z[x, y] -> E^(-b x) C[-x + y] then you will see immediately that the boundary conditons are contradictory. I hope this helps. J=E1nos