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seen Feb 13 '13 at 19:25

Feb
8
comment Setting boundary values of a second order differential equation
Hi Ruebenko, what we are trying to solve is a steady-state 2-D diffusion equation with a "decay term", -u[x,y] and a generation term at the orgin x = y = 0, -DiracDelta[x, y]. I understand the comment of Szabolcs regarding the delta-function. It can be replaced by a highly localizaed fucntion. If Mathematica can only handel an initial value problem, we could perhaps set it up as a time-dependent problem and later let t becomes very large. I am puzzled about how to set-up the boundary conditions. ">>" does not explain it well (sometime showing nothing). Thanks!
Feb
5
comment Setting boundary values of a second order differential equation
Are you aware any Methmatica tool for this type of problem? It appears DSolve works for a similar 1-D problem with a delta function
Feb
5
asked Setting boundary values of a second order differential equation