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Different graph partitioning methods, i.e., linear partioning, parallel hypergraph (PHG) partioning, and two approaches using ParMETIS, are considered to generate an unstructured decomposition of the second-level coarse operator of three-level FROSch (Fast and Robust Overlapping Schwarz) preconditioners in the Trilinos software library. In our context, the parallel hypergraph method shows the most consistent results.
Published on 10/03/21
Submitted on 10/03/21
Volume 700 - Numerical Methods and Algorithms in Science and Engineering, 2021
DOI: 10.23967/wccm-eccomas.2020.084
Licence: CC BY-NC-SA license
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