triangle_lyness_rule


triangle_lyness_rule, a MATLAB code which produces the Lyness-Jespersen family of quadrature rules over the interior of a triangle in 2D.

The rules have the following orders (number of points) and precisions (maximum degree of polynomials whose integrals they can compute exactly):
RuleOrderPrecision
0 1 1
1 3 2
2 4 2
3 4 3
4 7 3
5 6 4
6 10 4
7 9 4
8 7 5
9 10 5
10 12 6
11 16 6
12 13 6
13 13 7
14 16 7
15 16 8
16 21 8
17 16 8
18 19 9
19 22 9
20 2711
21 2811

Licensing:

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

Languages:

triangle_lyness_rule is available in a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

annulus_rule, a MATLAB code which computes a quadrature rule for estimating integrals of a function over the interior of a circular annulus in 2d.

cube_felippa_rule, a MATLAB code which returns the points and weights of a felippa quadrature rule over the interior of a cube in 3d.

pyramid_felippa_rule, a MATLAB code which returns felippa's quadratures rules for approximating integrals over the interior of a pyramid in 3d.

simplex_gm_rule, a MATLAB code which defines grundmann-moeller quadrature rules over the interior of a simplex in m dimensions.

square_felippa_rule, a MATLAB code which returns the points and weights of a felippa quadrature rule over the interior of a square in 2d.

stroud, a MATLAB code which contains quadrature rules for a variety of unusual areas, surfaces and volumes in 2d, 3d and m-dimensions.

tetrahedron_felippa_rule, a MATLAB code which returns felippa's quadratures rules for approximating integrals over the interior of a tetrahedron in 3d.

triangle_dunavant_rule, a MATLAB code which sets up a dunavant quadrature rule over the interior of a triangle in 2d.

triangle_exactness, a MATLAB code which investigates the polynomial exactness of a quadrature rule over the interior of a triangle in 2d.

triangle_fekete_rule, a MATLAB code which defines fekete rules for quadrature or interpolation over the interior of a triangle in 2d.

triangle_felippa_rule, a MATLAB code which returns felippa's quadratures rules for approximating integrals over the interior of a triangle in 2d.

triangle_lyness_rule_test

triangle_monte_carlo, a MATLAB code which uses the monte carlo method to estimate integrals over the interior of a triangle in 2d.

triangle_ncc_rule, a MATLAB code which defines newton-cotes closed (ncc) quadrature rules over the interior of a triangle in 2d.

triangle_nco_rule, a MATLAB code which defines newton-cotes open (nco) quadrature rules over the interior of a triangle in 2d.

triangle_wandzura_rule, a MATLAB code which sets up a quadrature rule of exactness 5, 10, 15, 20, 25 or 30 over the interior of a triangle in 2d.

wedge_felippa_rule, a MATLAB code which returns quadratures rules for approximating integrals over the interior of the unit wedge in 3d.

Reference:

  1. James Lyness, Dennis Jespersen,
    Moderate Degree Symmetric Quadrature Rules for the Triangle,
    Journal of the Institute of Mathematics and its Applications,
    Volume 15, Number 1, February 1975, pages 19-32.

Source Code:


Last revised on 06 April 2019.