Summary
In this paper an iterative method for solving nonsymmetric linear systems based on the Tchebychev polynomials in the complex plane is discussed. The iteration is shown to converge whenever the eigenvalues of the linear system lie in the open right half complex plane. An algorithm is developed for finding optimal iteration parameters as a function of the convex hull of the spectrum.
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Manteuffel, T.A. The Tchebychev iteration for nonsymmetric linear systems. Numer. Math. 28, 307–327 (1977). https://doi.org/10.1007/BF01389971
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DOI: https://doi.org/10.1007/BF01389971