Bessel functions footer

Bessel functions
Bessel $J_{\nu}$	Bessel $Y_{\nu}$	Modified Bessel $I_{\nu}$	Modified Bessel $K_{\nu}$	Spherical Bessel $j_{\nu}$	Spherical Bessel $y_{\nu}$
	Hankel $H_{\nu}^{(1)}$	Hankel $H_{\nu}^{(2)}$	Spherical Hankel $h_{\nu}^{(1)}$	Spherical Hankel $h_{\nu}^{(2)}$