diff(y2,x,1) = y1; diff(y1,x,1) = diff(y2,x,5); ! Digits := 32; max_terms := 30; ! x_start := 0.5; x_end := 10.0; array_y1_init[1] := exact_soln_y1(x_start); array_y2_init[1] := exact_soln_y2(x_start); glob_h := 0.00001 ; glob_look_poles := true; glob_max_iter := 10; glob_subiter_method := 3; ! exact_soln_y1 := proc(x) sin(x); end; exact_soln_y2 := proc(x) -cos(x); end;