gegenbauer_cc, a C++ code which uses a Clenshaw-Curtis approach to approximate the integral of a function f(x) with a Gegenbauer weight.

The Gegenbauer integral of a function f(x) is:

        value = integral ( -1 <= x <= + 1 ) ( 1 - x^2 )^(lambda-1/2) * f(x) dx
where -0.5 < lambda.


The computer code and data files made available on this web page are distributed under the MIT license


gegenbauer_cc is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:


GEGENBAUER_POLYNOMIAL, a C++ code which evaluates the Gegenbauer polynomial and associated functions.


  1. D B Hunter, H V Smith,
    A quadrature formula of Clenshaw-Curtis type for the Gegenbauer weight function,
    Journal of Computational and Applied Mathematics,
    Volume 177, 2005, pages 389-400.

Source Code:

Last revised on 07 March 2020.