wishlist: evaluating polcyclo() and others

[Jeroen Demeyer <jdemeyer@cage.ugent.be>]

Hello,

This is a long-time wishlist item of mine.  It concerns the functions 
which compute certain polynomials, for example polcyclo(), 
polchebyshev(), pollegendre() and maybe others.  These functions take an 
argument which is the variable, but I would really like to put anything 
there, for example polcyclo(10^6, 2) would compute the value of the 
10^6-th cyclotomic polynomial at the point 2.  Or polchebyshev(10^4, 
x*Mod(1,3)) to get the 10^4-th Chebyshev polynomial mod 3.  Essentially 
polcyclo(n,a) should be the same as subst(polcyclo(n),x,a).


Cheers,
Jeroen.