If anyone needs them, we have written some Maxima functions for generating
and evaluating the Chebyshev polynomials of the first and second kinds,
which unlike the functions in "specfun.mac", will also work correctly for
n<=0. They can be found in the file "cheby.mac" at
http://www.exstrom.com/maxima.html
Stefan Hollos, Richard Hollos
Exstrom Laboratories LLC