Abstract
We review some important ideas in the design and analysis of robust overlapping domain decomposition algorithms for high-contrast multiscale problems.
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Notes
- 1.
Due to the page limitation, only a few references are cited throughout.
- 2.
The coarse mesh does not necessarily resolve all the variations of κ.
- 3.
These works usually assume some alignment between the coefficient heterogeneities and the initial non-overlapping decomposition.
- 4.
We can include constructions of boundary conditions using 1D solution of the problem along the edges. Other choices include basis functions constructed using oversampling regions, energy minimizing partition of unity (global), constructions using limited global information (global), etc.
- 5.
Here we avoid restriction and extension operators for simplicity of notation.
- 6.
We mention that the analysis does not use a stable decomposition so, in principle, a new family of robust methods can be obtained.
- 7.
Having a robust condition number close to 1 is important, especially in applications where the elliptic equation needs to be solved many times.
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Galvis, J., Chung, E.T., Efendiev, Y., Leung, W.T. (2018). On Overlapping Domain Decomposition Methods for High-Contrast Multiscale Problems. In: Bjørstad, P., et al. Domain Decomposition Methods in Science and Engineering XXIV . DD 2017. Lecture Notes in Computational Science and Engineering, vol 125. Springer, Cham. https://doi.org/10.1007/978-3-319-93873-8_4
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