Function: poltchebi
Section: polynomials
C-Name: polchebyshev1
Prototype: LDn
Help: poltchebi(n,{v=x}): Tchebitcheff polynomial of degree n, in variable v.
 (For backward compatibility.)
Doc: creates the $n^{\text{th}}$ \idx{Chebyshev} polynomial~$T_n$ of the
 first kind in variable $v$. This function is retained for backward
 compatibility only. Use \tet{polchebyshev}.
