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Mathematics of Computation

Published by the American Mathematical Society since 1960 (published as Mathematical Tables and other Aids to Computation 1943-1959), Mathematics of Computation is devoted to research articles of the highest quality in computational mathematics.

ISSN 1088-6842 (online) ISSN 0025-5718 (print)

The 2020 MCQ for Mathematics of Computation is 1.78.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

A nonconforming Crouzeix-Raviart type finite element on polygonal meshes
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by Yanqiu Wang HTML | PDF
Math. Comp. 88 (2019), 237-271 Request permission

Abstract:

A nonconforming lowest order Crouzeix-Raviart type finite element, based on the generalized barycentric coordinates, is constructed on general polygonal (convex or nonconvex) meshes. We reveal a fundamental difference of the Crouzeix-Raviart type degrees of freedom between polygons with odd and even number of vertices, which results in slightly different local constructions of finite elements on these two types of polygons. Because of this, the topological structure of connected regions consisting of polygons with even number of vertices plays an essential role in understanding the global finite element space. To analyze such a topological structure, a new technical tool using the concept of cochain complex and cohomology is developed. Despite the seemingly complicated theoretical analysis, implementation of the element is straightforward. The nonconforming finite element method has optimal a priori error estimates. Proof and supporting numerical results are presented.
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Additional Information
  • Yanqiu Wang
  • Affiliation: School of Mathematical Sciences, Nanjing Normal University, Nanjing, People’s Republic of China
  • MR Author ID: 670715
  • Email: yqwang@njnu.edu.cn
  • Received by editor(s): April 19, 2017
  • Received by editor(s) in revised form: September 15, 2017, and November 1, 2017
  • Published electronically: April 10, 2018
  • Additional Notes: The author was supported by the Natural Science Foundation of China under grant numbers 11671210 and 91630201.
  • © Copyright 2018 American Mathematical Society
  • Journal: Math. Comp. 88 (2019), 237-271
  • MSC (2010): Primary 65N30
  • DOI: https://doi.org/10.1090/mcom/3334
  • MathSciNet review: 3854057