Scilab Function

chepol - Chebychev polynomial

### Sequence d'appel

  `[Tn]=chepol(n,var)`

### Parametres

- `n` : integer : polynomial order
- `var` : string : polynomial variable
- `Tn` : polynomial in the variable `var`

### Description

Recursive implementation of Chebychev polynomial. `Tn=2*poly(0,var)*chepol(n-1,var)-chepol(n-2,var)` with `T0=1` and `T1=poly(0,var)`.

### Exemples

    chepol(4,'x')

### Auteur

F. D.