Math Help - Bessel's Functions

1. Bessel's Functions

$J_{m}(x) = \sum^{infnty}_{s=0} \frac{(-1)^{s}x^{m+2s}}{2^{m+2s}s!(m+s)!}$

What do m and s physically mean in the bessel function?

I.e.
In maple,
This corresponds to ${\chi}^{s}_{m}$
where s = 3, m = 5

What do s and m mean though?

Thanks

2. Re: Bessel's Functions

Originally Posted by imagemania
$J_{m}(x) = \sum^{infnty}_{s=0} \frac{(-1)^{s}x^{m+2s}}{2^{m+2s}s!(m+s)!}$
What do m and s physically mean in the bessel function?
Thanks
Suppose that someone ask you on this manner:

$exp(x) = \sum^{infnty}_{s=0} \frac{x^{s}}{s!}$
What do s physically mean in the exponential function?