Riccati equations and convolution formulas for functions of Rayleigh type
Dharma P. Gupta, Martin E. Muldoon
Abstract
N. Kishore, Proc. Amer. Math. Soc. 14 (1963), 523, considered the Rayleigh functions sigman, sums of the negative even powers of the (non-zero) zeros of the Bessel function Jnu(z) and provided a convolution type sum formula for finding sigman in terms of sigma1, ...,sigman-1. His main tool was the recurrence relation for Bessel functions. Here we extend this result to a larger class of functions by using Riccati ifferential equations. We get new results for the zeros of certain combinations of Bessel functions and their first and second derivatives as well as recovering some results of Buchholz for zeros of confluent hypergeometric functions.
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