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An implicit $ QR$-algorithm for Hessenberg-like matrices

In the previous section we developed an implicit $ QR$-algorithm for symmetric semiseparable matrices. This was useful because every symmetric matrix can be transformed into a similar semiseparable one. As nonsymmetric matrices can be transformed via similarity transformations into Hessenberg-like matrices, we will deduce in this section an implicit $ QR$-algorithm this class of matrices.


Raf Vandebril 2004-05-03