Numerical integration as a finite matrix approximation to multiplication operator

Research output: Contribution to journalArticle


Research units


In this article, numerical integration is formulated as evaluation of a matrix function of a matrix that is obtained as a projection of the multiplication operator on a finite-dimensional basis. The idea is to approximate the continuous spectral representation of a multiplication operator on a Hilbert space with a discrete spectral representation of a Hermitian matrix. The Gaussian quadrature is shown to be a special case of the new method. The placement of the nodes of numerical integration and convergence of the new method are studied.


Original languageEnglish
Pages (from-to)283-291
Number of pages9
JournalJournal of Computational and Applied Mathematics
Publication statusPublished - 1 Jun 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Gaussian quadrature, Matrix function, Multiplication operator, Numerical integration

ID: 31554418