I must solve A*(Uxx+Uyy)-B(y)*Ux=0 , where Uxx means second partial derivative of U on x and Ux first partial derivative on x; Function U(x,y), A is constant and B(y) is function of y as (1-y*y): !
The eq has BC dU/dz=0 and dU/dy=0 IC U(0,y)=1 for -1<y<0 and U(0,y)=1 for 0<y<1 in Fortran!
Can anybody help me with some example? Thanks, Jan

mail: jan_golob@email.si