Orthogonal Polynomials

            
This module allows to create and manage orthogonal polynomials.

Features
--------

* ortpol_quadrature : Returns nodes and weights of a quadrature from alphas and
betas

For each polynomial 'x', the following functions are available :

 * x_eval : Evaluate polynomial
 * x_norm : Compute L2 norm
 * x_pdf : Evaluate probability distribution function
 * x_poly : Create polynomial
 * x_quadrature : Returns nodes and weights of Gauss quadrature
 * x_variance : Variance of polynomial
 * x_weight : Evaluate weight function

with :
 * x="chebyshev" : Chebyshev Polynomials
 * x="hermite" : Hermite Polynomials
 * x="laguerre" : Laguerre Polynomials
 * x="legendre" : Legendre Polynomials