## Numerical Integration

This chapter describes routines for performing numerical integration
(quadrature) of a function in one dimension. There are routines for
adaptive and non-adaptive integration of general functions, with
specialised routines for specific cases. These include integration over
infinite and semi-infinite ranges, singular integrals, including
logarithmic singularities, computation of Cauchy principal values and
oscillatory integrals. The library reimplements the algorithms used in
QUADPACK, a numerical integration package written by Piessens,
Doncker-Kapenga, Uberhuber and Kahaner. Fortran code for QUADPACK is
available on Netlib.

The functions described in this chapter are declared in the header file
`gsl_integration.h`

.