Szukana fraza: [Abstract = "The paper also shows preconditioning \(with the use of incomplete Gauss elimination\) and dividing the matrix into blocks where blocks are solved applying direct methods. The motivation for such hybrids is a very high condition number \(which is bad\) for coefficient matrices occuring in Markov chains and, thus, slow convergence of traditional iterative methods. Also, the blocking, preconditioning and merging of both are analysed."]

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