De Rham Complexes for Weak Galerkin Finite Element Spaces

De Rham Complexes for Weak Galerkin Finite Element Spaces
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DOI:
10.1016/j.cam.2021.113645
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发表时间:
2020-04
期刊:
ArXiv
影响因子:
--
通讯作者:
Chunmei Wang;Junping Wang;X. Ye;Shangyou Zhang
Chunmei Wang;Junping Wang;X. Ye;Shangyou Zhang
中科院分区:
其他
文献类型:
--
作者:
Chunmei Wang;Junping Wang;X. Ye;Shangyou Zhang

文献摘要

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对于一般多面体单元上的弱Galerkin(WG)有限元方法中的弱有限元函数和弱导数,引入了有限元空间的两个de Rham复序列.其中一个序列对序列中涉及的所有有限元空间使用等阶多项式,另一个序列使用自然降阶多项式。它表明,在这两个德拉姆复杂的图交换一般多面体元素。其中一个复形的精确性是建立在最低阶元素上的。
Two de Rham complex sequences of the finite element spaces are introduced for weak finite element functions and weak derivatives developed in the weak Galerkin (WG) finite element methods on general polyhedral elements. One of the sequences uses polynomials of equal order for all the finite element spaces involved in the sequence and the other one uses polynomials of naturally descending orders. It is shown that the diagrams in both de Rham complexes commute for general polyhedral elements. The exactness of one of the complexes is established for the lowest order element.