# Numerical integration over a spherical shell

## Description

Abstract A numerical integration rule is given for the calculation of three dimensional integrals on a spherical coordinate grid: integrals are considered as a weighted sum of integrand values. The program computes the points of the grid where the functions are to be determined and the associated weights. Two examples of integration are performed to normalize and integrate a numerical function. Title of program: R3DGL Catalogue Id: ABFT_v1_0 Nature of problem A numerical integration rule is given for the calculation of three dimensional integrals on a spherical coordinate grid: integrals are considered as a weighted sum of integrand values. The program computes the points of the grid where the functions are to be determined and the associated weights. An example of integration is performed to normalize a numerical function. Versions of this program held in the CPC repository in Mendeley Data ABFT_v1_0; R3DGL; 10.1016/0010-4655(89)90115-X This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)