A dual finite element complex on the barycentric refinement

A dual finite element complex on the barycentric refinement
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重心细化的双有限元复形

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通讯作者:
G. Lorenzo
G. Lorenzo
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作者:
S. Balari;G. Lorenzo

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在有向二维曲面上的简单网格得到以发散符合的Raviart-Thomas向量场为中心的有限元空间复X•,该复X•与简单辅链复形自然同构。在这种网格的质心细化上,我们构造了一个以旋度符合向量场为中心的复数Y•的有限元空间,它与原始网格上的简单链复形自然同构,并且使得Y 2 - i与X i处于l2对偶状态。在微分形式方面,这提供了霍奇对偶的有限元模拟。本文引自:A. Buffa, S.H. Christiansen, C. R. Acad. Sci。巴黎,爵士。i340(2005)。
A simplicial mesh on an oriented two-dimensional surface gives rise to a complex X • of finite element spaces centered on divergence conforming Raviart–Thomas vector fields and naturally isomorphic to the simplicial cochain complex. On the barycentric refinement of such a mesh, we construct finite element spaces forming a complex Y • , centered around curl conforming vector fields, naturally isomorphic to the simplicial chain complex on the original mesh and such that Y 2 − i is in L 2 duality with X i . In terms of differential forms this provides a finite element analogue of Hodge duality. To cite this article: A. Buffa, S.H. Christiansen, C. R. Acad. Sci. Paris, Ser. I 340 (2005). 