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@inproceedings{RSTADy1991OnTS, title={On the Spectra of Sums of Orthogonal Projectionswithapplications to Parallel Computing}, author={PETTER E. BJ RSTADy and JAN MANDELz}, year={1991} }

- Published 1991

Many parallel iterative algorithms for solving symmetric, positive deenite problems proceed by solving in each iteration, a number of independent systems on subspaces. The convergence of such methods is determined by the spectrum of the sums of orthogonal projections on those subspaces, while the convergence of a related sequential method is determined by… CONTINUE READING

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