Subject: renaming undocumented Bessel functions g0, g1, gn
From: Richard Fateman
Date: Sat, 22 Jul 2006 09:33:12 -0700
They are mentioned in the commercial Macsyma documentation.
They are
Modified Bessel functions 1st kind, times exp(-|X|) G0(X), G1(X),
GN(X,N)
They are not really bessel functions, or are they??
-----Original Message-----
From: maxima-admin at math.utexas.edu [mailto:maxima-admin at math.utexas.edu] On
Behalf Of Robert Dodier
Sent: Saturday, July 22, 2006 8:48 AM
To: Maxima
Subject: renaming undocumented Bessel functions g0, g1, gn
Hello,
I wonder if it's OK if I rename the functions g0, g1, and gn (in
src/bessel.lisp)
to bessel_g0, bessel_g1, and bessel_gn, respectively.
These functions are g0(x) = exp(-x)*I[0](x), g1(x) = exp(-x)*I[1](x), and
gn(x,n) = exp(-x)*I[n](x). I can't find any documentation for them
(neither under their own headings or under something else).
A letter followed by an integer is a popular scheme for naming
variables and functions so it's pretty easy for a name invented
by a user to collide with one of these (which is how I found them).
Robert Dodier
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