Re: Getting the variable of a polynomial

[Ariel Pacetti <apacetti@math.utexas.edu>]

We wrote (with Fernando Villegas) a stupid function for doing this (and 
some easy polynomials computations). You can found them in the web page:

http://www.ma.utexas.edu/users/villegas/cnt/cnt-frames.html

(the routine name is polynomials). Most routine are documented. This 
specific one is "variables" (you can modify the routine or the name)

? variables(x^2-t)
%1 = [t, x]

Cheers,

Ariel