Abstract
The construction of efficient iterative linear equation solvers for ill-conditioned general symmetric positive definite systems is discussed. Certain known two-level conjugate gradient preconditioning techniques are presented in a uniform way and are further generalized and optimized with respect to the spectral or the K-condition numbers. The resulting constructions have shown to be useful for the solution of largescale ill-conditioned symmetric positive definite linear systems.
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Axelsson, O., Kaporin, I. (2001). Optimizing Two-Level Preconditionings for the Conjugate Gradient Method. In: Margenov, S., Waśniewski, J., Yalamov, P. (eds) Large-Scale Scientific Computing. LSSC 2001. Lecture Notes in Computer Science, vol 2179. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45346-6_1
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DOI: https://doi.org/10.1007/3-540-45346-6_1
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