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SIAM. J. Matrix Anal. & Appl. 26, pp. 70-96 (27 pages)

Cubically Convergent Iterations for Invariant Subspace Computation

P. A. Absil, R. Sepulchre, P. Van Dooren, and R. Mahony

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We propose a Newton-like iteration that evolves on the set of fixed dimensional subspaces of $\rr^n$ and converges locally cubically to the invariant subspaces of a symmetric matrix. This iteration is compared in terms of numerical cost and global behavior with three other methods that display the same property of cubic convergence. Moreover, we consider heuristics that greatly improve the global behavior of the iterations.

© 2004 Society for Industrial and Applied Mathematics

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ISSN:

0895-4798 (print)  
1095-7162 (online)

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