On commuting $p$-version projection-based interpolation on tetrahedra
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Abstract:
On the reference tetrahedron $\widehat K$, we define three projection-based interpolation operators on $H^2(\widehat K)$, ${\mathbf H}^1(\widehat K,\operatorname {\mathbf {curl}})$, and ${\mathbf H}^1(\widehat K,\operatorname {div})$. These operators are projections onto spaces of polynomials, they have the commuting diagram property, and they feature the optimal convergence rate as the polynomial degree increases in $H^{1-s}(\widehat K)$, $\widetilde {\mathbf {H}}^{-s}(\widehat K,\operatorname {\mathbf {curl}})$, and $\widetilde {\mathbf {H}}^{-s}(\widehat K,\operatorname {div})$ for $0 \leq s \leq 1$.References
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Additional Information
- J. M. Melenk
- Affiliation: Institut für Analysis und Scientific Computing, Technische Universität Wien, Wiedner Hauptstraße 8-10, A-1040 Wien, Austria
- MR Author ID: 613978
- ORCID: 0000-0001-9024-6028
- Email: melenk@tuwien.ac.at
- C. Rojik
- Affiliation: Institut für Analysis und Scientific Computing, Technische Universität Wien, Wiedner Hauptstraße 8-10, A-1040 Wien, Austria
- Email: claudio.rojik@tuwien.ac.at
- Received by editor(s): February 2, 2018
- Received by editor(s) in revised form: October 12, 2018, and February 26, 2019
- Published electronically: June 11, 2019
- Additional Notes: The second author acknowledges the support of the Austrian Science Fund (FWF) under grant P 28367-N35
- © Copyright 2019 American Mathematical Society
- Journal: Math. Comp. 89 (2020), 45-87
- MSC (2010): Primary 65N30; Secondary 65N35
- DOI: https://doi.org/10.1090/mcom/3454
- MathSciNet review: 4011535