Re: convergence of QR-algorithm

From: hansm (mittelmann_at_asu.edu)
Date: 03/20/05

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    Date: 20 Mar 2005 12:52:39 -0800

    Jeremy,
    if your matrices are real I would not use complex arithmetic. In each
    step I would check the size of the subdiagonal elements from bottom to
    top and break the matrix apart, deflate, use a single shift or a double
    Francis step depending. It is not too complicated if you only want
    eigenvalues.
    Hans

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