Recall as you read this that WIYF and MWIYFin addition to the treatment of this available in Jackson, chapters 2, 3, 6, and 8 of Wyld, and doubtless Arfkin, Morse and Feshback, and probably six other sources if you look. Very important stuff, can't know it too well.

Recall from above the **Homogeneous Helmholtz Equation** (HHE):

(11.79) |

(11.80) |

(11.81) |

(11.82) |

(11.83) |

Two linearly independent solutions on
minus the origin to this
radial DE are:

(11.84) | |||

(11.85) |

the

The following is a **MINIMAL** table of their important properties.
A better table can be found in Wyld between chps. 6 and 7 and in Morse
and Feshbach (I can't remember which volume).

- Properties of Spherical Bessel Functions

- , , and )
- General Solutions to the HHE
- Green's Functions and Free Spherical Waves