Algorithm 867: QUADLOG—a package of routines for generating Gauss-related quadrature for two classes of logarithmic weight functions

摘要: A collection of subroutines and examples their uses are described for the quadrature method developed in companion article. These allow exact evaluation (up to computer truncation rounding errors) integrals polynomials with two general types logarithmic weights, also corresponding nonlogarithmic weights. The recurrence coefficients related nonclassical orthogonal weight functions can be obtained. Tests accuracy on various platforms presented.The routines usable from Fortran, C, Cpp programs conforming any at least six international programming-language standards.