A Fast Transform for Spherical Harmonics.
A number of properties of a function which originally appeared in a problem proposed by Ramanujan are presented. Several equivalent representations of the function are derived. These can be used to evaluate the function. A new derivation of an expansion in inverse powers of the argument of the function is obtained, as well as rational expressions for higher order coefficients.
We obtain, for entire functions of exponential type satisfying certain integrability conditions, a quadrature formula using the zeros of spherical Bessel functions as nodes. We deduce from this quadrature formula a result of Olivier and Rahman, which refines itself a formula of Boas.
Let be a sequence of arbitrary complex numbers, let α,β > -1, let Pₙα,βn=0+∞
We give higher-power generalizations of the classical Lerch formula for the gamma function.