stroud
stroud,
a C++ code which
defines quadrature rules for a variety of Mdimensional regions,
including the interior of the square, cube and hypercube, the pyramid,
cone and ellipse, the hexagon, the Mdimensional octahedron,
the circle, sphere and hypersphere, the triangle, tetrahedron and simplex,
and the surface of the circle, sphere and hypersphere.
A few other rules have been collected as well,
particularly for quadrature over the interior of a triangle, which is
useful in finite element calculations.
Arthur Stroud published his vast collection of quadrature formulas
for multidimensional regions in 1971. In a few cases, he printed
sample FORTRAN77 programs to compute these integrals. Integration
regions included:

C2, the interior of the square;

C3, the interior of the cube;

CN, the interior of the Ndimensional hypercube;

CN:C2, a 3dimensional pyramid;

CN:S2, a 3dimensional cone;

CN_SHELL, the region contained between two concentric
Ndimensional hypercubes;

ELP, the interior of the 2dimensional ellipse with
weight function 1/sqrt((xc)^2+y^2)/(sqrt((x+c)^2+y^2);

EN_R, all of Ndimensional space, with the weight function:
w(x) = exp (  sqrt ( sum ( 1 <= i < n ) x(i)^2 ) );

EN_R2, all of Ndimensional space, with the Hermite weight function:
w(x) = product ( 1 <= i <= n ) exp (  x(i)^2 );

GN, the interior of the Ndimensional octahedron;

H2, the interior of the 2dimensional hexagon;

PAR, the first parabolic region;

PAR2, the second parabolic region;

PAR3, the third parabolic region;

S2, the interior of the circle;

S3, the interior of the sphere;

SN, the interior of the Ndimensional hypersphere;

SN_SHELL, the region contained between two concentric Ndimensional hyperspheres;

T2, the interior of the triangle;

T3, the interior of the tetrahedron;

TN, the interior of the Ndimensional simplex;

TOR3:S2, the interior of a 3dimensional torus with circular crosssection;

TOR3:C2, the interior of a 3dimensional torus with square crosssection;

U2, the "surface" of the circle;

U3, the surface of the sphere;

UN, the surface of the Ndimensional sphere;
We have added a few new terms for regions:

CN_GEG, the N dimensional hypercube [1,+1]^N, with the Gegenbauer
weight function:
w(alpha;x) = product ( 1 <= i <= n ) ( 1  x(i)^2 )^alpha;

CN_JAC, the N dimensional hypercube [1,+1]^N, with the Beta or
Jacobi weight function:
w(alpha,beta;x) = product ( 1 <= i <= n ) ( 1  x(i) )^alpha * ( 1 + x(i) )^beta;

CN_LEG, the N dimensional hypercube [1,+1]^N, with the Legendre
weight function:
w(x) = 1;

EPN_GLG, the positive space [0,+oo)^N, with the generalized
Laguerre weight function:
w(alpha;x) = product ( 1 <= i <= n ) x(i)^alpha exp (  x(i) );

EPN_LAG, the positive space [0,+oo)^N, with the exponential or
Laguerre weight function:
w(x) = product ( 1 <= i <= n ) exp (  x(i) );
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
stroud is available in
a C version and
a C++ version and
a FORTRAN90 version and
a MATLAB version.
Related Data and Programs:
DISK_RULE,
a C++ code which
computes quadrature rules for the unit disk in 2D, that is,
the interior of the circle of radius 1 and center (0,0).
FELIPPA,
a C++ code which
defines quadrature rules for lines, triangles, quadrilaterals,
pyramids, wedges, tetrahedrons and hexahedrons.
PYRAMID_RULE,
a C++ code which
computes a quadrature rule for a pyramid.
SIMPLEX_GM_RULE,
a C++ code which
defines GrundmannMoeller quadrature rules
over the interior of a triangle in 2D, a tetrahedron in 3D, or
over the interior of the simplex in M dimensions.
SPHERE_LEBEDEV_RULE,
a C++ code which
computes Lebedev quadrature rules
on the surface of the unit sphere in 3D.
stroud_test
TETRAHEDRON_ARBQ_RULE,
a C++ code which
returns quadrature rules,
with exactness up to total degree 15,
over the interior of a tetrahedron in 3D,
by Hong Xiao and Zydrunas Gimbutas.
TETRAHEDRON_KEAST_RULE,
a C++ code which
defines ten quadrature rules, with exactness degrees 0 through 8,
over the interior of a tetrahedron in 3D.
TETRAHEDRON_NCC_RULE,
a C++ code which
defines NewtonCotes Closed (NCC) quadrature rules
over the interior of a tetrahedron in 3D.
TETRAHEDRON_NCO_RULE,
a C++ code which
defines NewtonCotes Open (NCO) quadrature rules
over the interior of a tetrahedron in 3D.
TRIANGLE_DUNAVANT_RULE,
a C++ code which
defines Dunavant rules for quadrature
over the interior of a triangle in 2D.
TRIANGLE_FEKETE,
a C++ code which
defines Fekete rules for interpolation or quadrature
over the interior of a triangle in 2D.
TRIANGLE_LYNESS_RULE,
a C++ code which
returns LynessJespersen quadrature rules
over the interior of a triangle in 2D.
TRIANGLE_NCC_RULE,
a C++ code which
defines NewtonCotes Closed (NCC) quadrature rules
over the interior of a triangle in 2D.
TRIANGLE_NCO_RULE,
a C++ code which
defines NewtonCotes Open (NCO) quadrature rules
over the interior of a triangle in 2D.
TRIANGLE_WANDZURA_RULE,
a C++ code which
returns quadrature rules of exactness 5, 10, 15, 20, 25 and 30
over the interior of the triangle in 2D.
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Source Code:
Last revised on 20 April 2020.