A deflation formula for tridiagonal matrices
Miroslav Fiedler (1980)
Aplikace matematiky
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An explicit formula for the deflation of a tridiagonal matrix is presented. The resulting matrix is again tridiagonal.
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A deflation formula for tridiagonal matrices
On relations between right and left eigenvectors of nonselfadjoint matrix pencils
R. Zezula, J. Roček, A. Miasnikov (1977)
Acta Universitatis Carolinae. Mathematica et Physica
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Combining the preconditioned conjugate gradient method and a matrix iterative method
Jan Zítko (1996)
Applications of Mathematics
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The preconditioned conjugate gradient method for solving the system of linear algebraic equations with a positive definite matrix is investigated. The initial approximation for conjugate gradient is constructed as a result of a matrix iteration method after steps. The behaviour of the error vector for such a combined method is studied and special numerical tests and conclusions are made.