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ChebyshevPoly    --    Orthogonal Polynomials: Chebyshev, Hermite, Laguerre


Syntax 
ChebyshevPoly(N: INT, X: RINGELEM): RINGELEM
ChebyshevPoly2(N: INT, X: RINGELEM): RINGELEM

Description
The function ChebyshevPoly returns the Chebyshev polynomial (of 1st type) with index N, in the indeterminate X. The function ChebyshevPoly2 returns the Chebyshev polynomial of 2nd type.

These functions also work if X is not an indeterminate: the result is then the evaluation of the polynomial at the given value.

Example 
/**/  use R ::= QQ[x];
/**/  ChebyshevPoly(3,x);
4*x^3 -3*x

See Also