Multilevel Spectral Domain Decomposition

@article{Bastian2022MultilevelSD,
  title={Multilevel Spectral Domain Decomposition},
  author={Peter Bastian and Robert Scheichl and Linus Seelinger and Arne Strehlow},
  journal={ArXiv},
  year={2022},
  volume={abs/2106.06404}
}
Highly heterogeneous, anisotropic coefficients, e.g. in the simulation of carbon-fibre composite components, can lead to extremely challenging finite element systems. Direct solvers for the resulting large and sparse linear systems suffer from severe memory requirements and limited parallel scalability, while iterative solvers in general lack robustness. Two-level spectral domain decomposition methods can provide such robustness for symmetric positive definite linear systems, by using coarse… 
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