diff ( y , x , 1 ) = erf(sqrt(x));
!
# Comment 1
Digits := 32;
max_terms := 30;
# Comment 2
!
# Comment 3
x_start := 0.1;
x_end := 1.0 ;
diff(y,0,exact_soln_y(x_start));
glob_look_poles := true;
glob_max_iter := 1000000;
glob_max_h := 0.00001;
# Comment 4
!
# Comment 5
exact_soln_y := proc(x)
# Comment 6

return(x * erf(sqrt(x)) - ( 2.0 * (-1.0/2.0 * sqrt(x) / exp(x) + 1.0/4.0 *
sqrt(evalf(Pi)) * erf(sqrt(x))))/sqrt(evalf(Pi))) ;

# Comment 7
end;