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- W2611265141 abstract "Composite basis functions for pyramidal elements on the spaces H1(Ω), H(curl,Ω), H(div,Ω) and L2(Ω) are presented. In particular, we construct the lowest-order composite pyramidal elements and show that they respect the de Rham diagram, i.e. we have an exact sequence and satisfy the commuting property. Moreover, the finite elements are fully compatible with the standard finite elements for the lowest-order Raviart–Thomas–Nédélec sequence on tetrahedral and hexahedral elements. That is to say, the new elements have the same degrees of freedom on the shared interface with the neighbouring hexahedral or tetrahedra elements, and the basis functions are conforming in the sense that they maintain the required level of continuity (full, tangential component, normal component, etc.) across the interface. Furthermore, we study the approximation properties of the spaces as an initial partition consisting of tetrahedra, hexahedra and pyramid elements are successively subdivided and show that the spaces result in the same (optimal) order of approximation in terms of the mesh size h as one would obtain using purely hexahedral or purely tetrahedral partitions." @default.
- W2611265141 created "2017-05-12" @default.
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- W2611265141 date "2017-09-01" @default.
- W2611265141 modified "2023-09-27" @default.
- W2611265141 title "A lowest-order composite finite element exact sequence on pyramids" @default.
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- W2611265141 doi "https://doi.org/10.1016/j.cma.2017.05.030" @default.
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