Application of Randomized Quadrature Formulas to the Finite Element Method for Elliptic Equations
Abstract
The implementation of the finite element method for linear elliptic equations requires to assemble the stiffness matrix and the load vector. In general, the entries of this matrix-vector system are not known explicitly but need to be approximated by quadrature rules. If the coefficient functions of the differential operator or the forcing term are irregular, then standard quadrature formulas, such as the barycentric quadrature rule, may not be reliable. In this paper we investigate the application of two randomized quadrature formulas to the finite element method for such elliptic boundary value problems with irregular coefficient functions. We give a detailed error analysis of these methods, discuss their implementation, and demonstrate their capabilities in several numerical experiments.
Cite
@article{arxiv.1908.08901,
title = {Application of Randomized Quadrature Formulas to the Finite Element Method for Elliptic Equations},
author = {Raphael Kruse and Nick Polydorides and Yue Wu},
journal= {arXiv preprint arXiv:1908.08901},
year = {2019}
}
Comments
36 pages, 7 figures, 1 table