i have been trying to solve a pde problem for 3 days but i couldn't even find the answer,now i feel i m about to have a mental disease,anyone can help me ?the question is
u(x,0) = x
u(x,2) = 0
u(0,y) = 0
d u(1,y) / dx = 0
[ d^2 u / dx^2 ] + [ d^2 u / dy^2 ] = 0
i will really be...