diff ( y , x , 5 ) = m1 * diff ( y , x , 3) ; ! Digits := 64; max_terms := 40; ! x_start := c(0.1); x_end := c(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; # # Not Given = 0 # Real = 1 # Complex = 2 # No Pole = 3 # Impossible Eq = 4 # glob_type_given_pole := 3; ! exact_soln_y := proc(x) return(cos(c(x))); end; exact_soln_yp := proc(x) return(glob__m1 * sin(c(x))); end; exact_soln_ypp := proc(x) return(glob__m1 * cos(c(x))); end; exact_soln_yppp := proc(x) return(sin(x)); end; exact_soln_ypppp := proc(x) return(cos(c(x))); end;