We use Lagrange elements as an example to introduce the simplicial lattice and construction of finite elements based on a decomposition of the simplicial lattice.
Reference: Geometric decompositions of the simplicial lattice and smooth finite elements in arbitrary dimension Long Chen and Xuehai Huang. arXiv.2021.
It’s clear to use the one-to-one mapping between the Bernstein basis and the simplicial lattice .
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