Equation Icon  2d( V~ |n-+-2d|+ V~ |n| )(y - y ) V ~ ------- V~ ------- m+2d,n+2d m-2d,n+2d +( |n + d|- |n - d|)((m + 2d)ym+2d,n- mym,n + (m - 2d)ym -2d,n) V~ -------- V~ --- - 2d( |n - 2d|+ |n |)(ym+2d,n-2d- ym -2d,n-2d) = 0 (52)