**quadrilateral_witherden_rule_test**,
a Fortran90 code which
calls quadrilateral_witherden_rule(), which
returns a Witherden quadrature rule, with exactness up to total degree 21,
over the interior of a quadrilateral.

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

quadrilateral_witherden_rule, a Fortran90 code which returns a Witherden quadrature rule, with exactness up to total degree 21, over the interior of a quadrilateral.

- quadrilateral_witherden_rule_test.f90, calls all the tests.
- quadrilateral_witherden_rule_test.sh, runs all the tests.
- quadrilateral_witherden_rule_test.txt, the output file.