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- W2907412065 abstract "A highly scalable implementation of an inexact BDDC (Balancing Domain Decomposition by Constraints) method is presented, and scalability results for linear elasticity problems in two and three dimensions for up to 131,072 computational cores of the JUQUEEN BG/Q are shown. In this method, the inverse action of the partially coupled stiffness matrix is replaced by V-cycles of an AMG (algebraic multigrid) method. The use of classical AMG for systems of PDEs, based on a nodal coarsening approach is compared with a recent AMG method using an explicit interpolation of the rigid body motions (global matrix approach; GM). It is illustrated, that for systems of PDEs an appropriate AMG interpolation is mandatory for fast convergence, i.e., using exact interpolation of rigid body modes in elasticity." @default.
- W2907412065 created "2019-01-11" @default.
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- W2907412065 date "2018-01-01" @default.
- W2907412065 modified "2023-09-27" @default.
- W2907412065 title "Using Algebraic Multigrid in Inexact BDDC Domain Decomposition Methods" @default.
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- W2907412065 doi "https://doi.org/10.1007/978-3-319-93873-8_40" @default.
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