Comment on "note on the derivative of the hyperbolic cotangent"
Quantum Physics
2007-05-23 v1
Abstract
In a couple of articles (Ford G W and O'Connell R F 1996 Nature 380 113 and 2002 J. Phys. A: Math. Gen. 35 4183) it was argued that the standard result for the derivative of the hyperbolic cotangent in the literature, d \coth y/dy = -{csch}^2 y is incomplete and the correct expression should have an additional term proportional to the Dirac delta function. The purpose of this paper is to demonstrate that this claim is incorrect.
Cite
@article{arxiv.0705.1512,
title = {Comment on "note on the derivative of the hyperbolic cotangent"},
author = {Ilki Kim},
journal= {arXiv preprint arXiv:0705.1512},
year = {2007}
}