I've had some trouble applying NDSolve to the following differential equation:
for x in [-1,1] and y in [-1,1] with the following initial conditions:
f(x,1) = 0; f(x,-1) = 0;
f(1,y) = 0; f(-1,y) = 0;
At first sight it looks simple but apparently it's not. Can you please help me? It's really urgent and even teachers at my university are unable to cope with the problem!
Thanks a lot!!!!