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High Order Mass-Lumping Finite Elements on Simplexes

  • Tao Cui (a1), Wei Leng (a1), Deng Lin (a1) (a2), Shichao Ma (a1) (a2) and Linbo Zhang (a1) (a2)...

This paper is concerned with the construction of high order mass-lumping finite elements on simplexes and a program for computing mass-lumping finite elements on triangles and tetrahedra. The polynomial spaces for mass-lumping finite elements, as proposed in the literature, are presented and discussed. In particular, the unisolvence problem of symmetric point-sets for the polynomial spaces used in mass-lumping elements is addressed, and an interesting property of the unisolvent symmetric point-sets is observed and discussed. Though its theoretical proof is still lacking, this property seems to be true in general, and it can greatly reduce the number of cases to consider in the computations of mass-lumping elements. A program for computing mass-lumping finite elements on triangles and tetrahedra, derived from the code for computing numerical quadrature rules presented in [7], is introduced. New mass-lumping finite elements on triangles found using this program with higher orders, namely 7, 8 and 9, than those available in the literature are reported.

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*Corresponding author. Email addresses: (T. Cui), (W. Leng), (D. Lin), (S. C. Ma), (L. B. Zhang)
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[1] G. Cohen , P. Joly , J. E. Roberts and N. Tordjman , Higher order triangular finite elements with mass lumping for the wave equation, SIAM J. Numer. Anal., 38:6 (2001), pp. 20472078.

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[14] S. A. Papanicolopulos , Efficient computation of cubature rules with application to new asymmetric rules on the triangle, J. Comput. Appl. Math., 304 (2016), pp. 7383.

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Numerical Mathematics: Theory, Methods and Applications
  • ISSN: 1004-8979
  • EISSN: 2079-7338
  • URL: /core/journals/numerical-mathematics-theory-methods-and-applications
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