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Keywords:
prismatic finite element; interpolation error; semiregular family of prismatic partitions
Summary:
We propose an analogue of the maximum angle condition (commonly used in finite element analysis for triangular and tetrahedral meshes) for the case of prismatic elements. Under this condition, prisms in the meshes may degenerate in certain ways, violating the so-called inscribed ball condition presented by P. G. Ciarlet (1978), but the interpolation error remains of the order $O(h)$ in the $H^{1}$-norm for sufficiently smooth functions.
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