Abstract
Historically, coarse spaces for domain decomposition methods were based on a coarse grid, like in geometric multigrid methods, see e.g. [17, page 36]: “The subspace 𝑉0 is usually related to a coarse problem, often built on a coarse mesh”.
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Cuvelier, F., Gander, M.J., Halpern, L. (2022). Fundamental Coarse Space Components for Schwarz Methods with Crosspoints. In: Brenner, S.C., Chung, E., Klawonn, A., Kwok, F., Xu, J., Zou, J. (eds) Domain Decomposition Methods in Science and Engineering XXVI. Lecture Notes in Computational Science and Engineering, vol 145. Springer, Cham. https://doi.org/10.1007/978-3-030-95025-5_4
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DOI: https://doi.org/10.1007/978-3-030-95025-5_4
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