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Erschienen in:

20.09.2022

The Bubble Transform and the de Rham Complex

verfasst von: Richard S. Falk, Ragnar Winther

Erschienen in: Foundations of Computational Mathematics | Ausgabe 1/2024

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Abstract

The purpose of this paper is to discuss a generalization of the bubble transform to differential forms. The bubble transform was discussed in Falk and Winther (Found Comput Math 16(1):297–328, 2016) for scalar valued functions, or zero-forms, and represents a new tool for the understanding of finite element spaces of arbitrary polynomial degree. The present paper contains a similar study for differential forms. From a simplicial mesh \({{\mathscr {T}}}\) of the domain \(\varOmega \), we build a map which decomposes piecewise smooth k-forms into a sum of local bubbles supported on appropriate macroelements. The key properties of the decomposition are that it commutes with the exterior derivative and preserves the piecewise polynomial structure of the standard finite element spaces of k-forms. Furthermore, the transform is bounded in \(L^2\) and also on the appropriate subspace consisting of k-forms with exterior derivatives in \(L^2\).

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Metadaten
Titel
The Bubble Transform and the de Rham Complex
verfasst von
Richard S. Falk
Ragnar Winther
Publikationsdatum
20.09.2022
Verlag
Springer US
Erschienen in
Foundations of Computational Mathematics / Ausgabe 1/2024
Print ISSN: 1615-3375
Elektronische ISSN: 1615-3383
DOI
https://doi.org/10.1007/s10208-022-09589-1