Summary.
This work extends the results of Arioli [1], [2] on stopping criteria for iterative solution methods for linear finite element problems to the case of nonsymmetric positive-definite problems. We show that the residual measured in the norm induced by the symmetric part of the inverse of the system matrix is relevant to convergence in a finite element context. We then use Krylov solvers to provide alternative ways of calculating or estimating this quantity and present numerical experiments which validate our criteria.
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Mathematics Subject Classification (2000): 65N30, 65F10, 65F35
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Arioli, M., Loghin, D. & Wathen, A. Stopping criteria for iterations in finite element methods. Numer. Math. 99, 381–410 (2005). https://doi.org/10.1007/s00211-004-0568-z
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DOI: https://doi.org/10.1007/s00211-004-0568-z