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Henry Weller authored
using a run-time selectable preconditioner References: Van der Vorst, H. A. (1992). Bi-CGSTAB: A fast and smoothly converging variant of Bi-CG for the solution of nonsymmetric linear systems. SIAM Journal on scientific and Statistical Computing, 13(2), 631-644. Barrett, R., Berry, M. W., Chan, T. F., Demmel, J., Donato, J., Dongarra, J., Eijkhout, V., Pozo, R., Romine, C. & Van der Vorst, H. (1994). Templates for the solution of linear systems: building blocks for iterative methods (Vol. 43). Siam. See also: https://en.wikipedia.org/wiki/Biconjugate_gradient_stabilized_method Tests have shown that PBiCGStab with the DILU preconditioner is more robust, reliable and shows faster convergence (~2x) than PBiCG with DILU, in particular in parallel where PBiCG occasionally diverges. This remarkable improvement over PBiCG prompted the update of all tutorial cases currently u...
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