From: matz@... (Yukihiro Matsumoto)
Date: 2002-04-08T16:38:26+09:00
Subject: Re: Additions to math.c (more math functions)

Hi,

In message "Additions to math.c (more math functions)"
    on 02/04/06, Mike Hall <mghall@enteract.com> writes:

|Since 1.7 added the hyperbolic trig functions,
|I figured it should have their 'arc' functions, too.
|While I was at it, I added the Bessel funcs,
|and 'lgamma', and added a few constants.
|
|A patch file is attached, as is a little test script.

These functions and constants are defined under difference standards.
POSIX, SVID, SVIF, etc.  I'm not sure how far we should go, and how we
treat undefined functions (yet).

But acosh, asinh, atanh are defined in POSIX, which Ruby already
relies on, so I will add them.

							matz.