ANNULUS_RULE is a FORTRAN90 library which computes a quadrature rule over the interior of the annulus in 2D, with center (XC,YC), inner radius R1 and outer radius R2.
The user specifies values NT and NR, where NT is the number of equally spaced angles, and NR controls the number of radial points.
To use a rule that is equally powerful in R and T, typically, set NT = 4 * NR.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
ANNULUS_RULE is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
ANNULUS_MONTE_CARLO a FORTRAN90 library which uses the Monte Carlo method to estimate the integral of a function over the interior of a circular annulus in 2D.
CIRCLE_RULE, a FORTRAN90 library which computes quadrature rules over the circumference of a circle in 2D.
CUBE_ARBQ_RULE, a FORTRAN90 library which computes quadrature rules with exactness up to total degree 15, over the interior of a cube in 3D.
CUBE_FELIPPA_RULE, a FORTRAN90 library which returns the points and weights of a Felippa quadrature rule over the interior of a cube in 3D.
DISK_RULE, a FORTRAN90 library which computes quadrature rules over the interior of the general disk in 2D.
DISK01_RULE, a FORTRAN90 library which computes quadrature rules over the interior of the unit disk in 2D.
PYRAMID_FELIPPA_RULE, a FORTRAN90 library which returns Felippa's quadratures rules for approximating integrals over the interior of a pyramid in 3D.
PYRAMID_RULE, a FORTRAN90 program which computes a quadrature rule over the interior of the unit pyramid in 3D.
SPHERE_LEBEDEV_RULE, a FORTRAN90 library which computes Lebedev quadrature rules on the surface of the unit sphere in 3D.
SQUARE_FELIPPA_RULE, a FORTRAN90 library which returns the points and weights of a Felippa quadrature rule over the interior of a square in 2D.
TETRAHEDRON_FELIPPA_RULE, a FORTRAN90 library which returns Felippa's quadratures rules for approximating integrals over the interior of a tetrahedron in 3D.
TRIANGLE_FELIPPA_RULE, a FORTRAN90 library which returns Felippa's quadratures rules for approximating integrals over the interior of a triangle in 2D.
WEDGE_FELIPPA_RULE, a FORTRAN90 library which returns quadratures rules for approximating integrals over the interior of the unit wedge in 3D.
You can go up one level to the FORTRAN90 source codes.