Ramanujan's formula for the logarithmic derivative of the gamma function
Classical Analysis and ODEs
2007-06-13 v1 Number Theory
Abstract
We prove a remarkable formula of Ramanujan for the logarithmic derivative of the gamma function, which converges more rapidly than classical expansions, and which is stated without proof in Ramanujan's notebooks. The formula has a number of very interesting consequences which we derive, including an elegant hyperbolic summation, Ramanujan's formula for the Riemann zeta function evaluated at the odd positive integers, and new formulae for Euler's constant, gamma.
Cite
@article{arxiv.math/0505125,
title = {Ramanujan's formula for the logarithmic derivative of the gamma function},
author = {David M. Bradley},
journal= {arXiv preprint arXiv:math/0505125},
year = {2007}
}
Comments
AMSTeX; Math Reviews MR #97a:11132