Abstract
Some special classes of tridiagonal matrices A are considered, and the complexity of solving a linear system Ax=f is investigated, when rational preconditioning on A is allowed. Non-trivial lower bounds are found, and in all cases the number of necessary multiplicative operations, apart from preconditioning, is shown to be greater than the number of indeterminates defining A.
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Bevilacqua, R., Bozzo, E., Temperanza, G. et al. Complexity bounds for solving some tridiagonal systems with preconditioning. Calcolo 30, 127–143 (1993). https://doi.org/10.1007/BF02576177
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DOI: https://doi.org/10.1007/BF02576177