diff ( y , x , 5 ) = m1 * diff ( y , x , 3) ; ! Digits := 64; max_terms := 30; ! x_start := 0.1; x_end := 1.5 ; # # Trouble about Pi/2 # diff(y,0,exact_soln_y(x_start)); diff(y,1,exact_soln_yp(x_start)); diff(y,2,exact_soln_ypp(x_start)); diff(y,3,exact_soln_yppp(x_start)); diff(y,4,exact_soln_ypppp(x_start)); glob_look_poles := true; glob_display_interval := 0.1; glob_max_minutes := 2; glob_desired_digits_correct := 10; ! exact_soln_y := proc(x) return(cos(x)); end; exact_soln_yp := proc(x) return(-sin(x)); end; exact_soln_ypp := proc(x) return(-cos(x)); end; exact_soln_yppp := proc(x) return(sin(x)); end; exact_soln_ypppp := proc(x) return(cos(x)); end;