Numerical integration (quadrature)

Lebedev quadrature

In numerical analysis, Lebedev quadrature, named after Vyacheslav Ivanovich Lebedev, is an approximation to the surface integral of a function over a three-dimensional sphere. The grid is constructed so to have octahedral rotation and inversion symmetry. The number and location of the grid points together with a corresponding set of integration weights are determined by enforcing the exact integration of polynomials (or equivalently, spherical harmonics) up to a given order, leading to a sequence of increasingly dense grids analogous to the one-dimensional Gauss-Legendre scheme. The Lebedev grid is often employed in the numerical evaluation of volume integrals in the spherical coordinate system, where it is combined with a one-dimensional integration scheme for the radial coordinate. Applications of the grid are found in fields such as computational chemistry and neutron transport. (Wikipedia).

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Related pages

Permutation | Neutron transport | Polynomial | Numerical analysis | Surface integral | Octahedral symmetry | Gaussian quadrature | Spherical coordinate system | Vyacheslav Ivanovich Lebedev | Sphere | Spherical harmonics