[Maxima] bugs in special functions?

[Raymond Toy]

David Joyner wrote:
> Hi:
>
> Based on
> http://idlastro.gsfc.nasa.gov/idl_html_help/BESELJ.html
> it seems as though the function bessel_j(nu,z) as described
> in
> http://maxima.sourceforge.net/docs/manual/en/maxima_16.html#SEC52
> should be bessel_j(z,nu):
>
> Maxima restarted.
> (%i1) bessel_j(2,4.8);
>
> (%o1)                          0.11605038641637
> (%i2) bessel_j(4.8,2);
>
> (%o2)                           0.009807521141
> (%i3)
>
>   
I think bessel_j is implemented as specified.  The first parameter is
the order and the second is the argument.  IDL says the second parameter
is the order, and hence opposite of what maxima does.

Ray