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- W2112905438 abstract "The BDDC (balancing domain decomposition by constraints) algorithms are similar to the balancing Neumann-Neumann methods, with a small number of continuity constraints enforced across the interface throughout the iterations. These constraints form a coarse, global component of the preconditioner. The BDDC methods are powerful for solving large sparse linear algebraic systems arising from discretizations of elliptic boundary value problems. In this paper, the BDDC algorithm is extended to saddle point problems generated from the mixed nite element methods used to approximate the scalar elliptic problems for o w in porous media. Edge/face average constraints are enforced and the same rate of convergence is obtained as for simple elliptic cases. The condition number bound is estimated and numerical experiments are discussed. In addition, a comparison of the BDDC method with an edge/face-based iterative substructuring method is provided." @default.
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- W2112905438 date "2005-01-01" @default.
- W2112905438 modified "2023-09-23" @default.
- W2112905438 title "A BDDC ALGORITHM FOR A MIXED FORMULATION OF FLOW IN POROUS MEDIA" @default.
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