pde_bihar2d_eq.java running. solve uxxxx(x,y) + 2*uxxyy(x,y) + uyyyy(x,y) + 2*uxx(x,y) + 2*uyy(x,y) + 2*u(x,y) = f(x,y) f(x,y) := 2.4 + 0.08*x*x + 0.32*y*y + 1.6*x*y + 0.02*x*x*x*x + 0.04*y*y*y*y - 0.08*x*x*y*y + 0.2*x*x*x*y + 0.4*y*y*y*x in the rectangle xmin< x