Abstract
Approximation and Inclusion of Multiple Matrix-Eigenvalues S.M. Rump An algorithm will be discussed for approximation and verified inclusion of clustered or multiple eigenvalues and invariant subspaces of real or complex matrices. The method includes a quadratically concergent iteration, and is applicable to the generalized eigenproblem as well. Computational examples will be given.	General Enquiries Dr. Malcolm Brown. Computer Science Cardiff University PO Box 916 Cardiff CF24 3XF, U.K. Malcom@cs.cf.ac.uk

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