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Convergence and comparison results for double splittings of Hermitian positive definite matrices. (English) Zbl 1150.65008
The authors give sufficient conditions for convergence of a 2-step stationary iteration based on a double splitting of the matrix, i.e. A=P-R-S, when the aim is solution of Ax=b. This condition is weaker than an earlier result by two of the same authors. Moreover, a comparison result for two double splittings of the same matrix is proved.
MSC:
65F10Iterative methods for linear systems
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