[BANANA] LA/Opt seminar TODAY (Aaron Melman)

[Michael A. Saunders]

REMINDER -- seminar this afternoon

    Linear Algebra and Optimization Seminar (CME 510)
    iCME, Stanford University
    http://icme.stanford.edu/seminars/seminars.php

    4:15pm Wed April 29, 2009
    Terman 332

    Prof Aaron Melman <amelman at scu.edu>
    Santa Clara University

    SPECTRAL INCLUSION REGIONS FOR STRUCTURED MATRICES

We derive eigenvalue inclusion sets for centrohermitian,
skew-centrohermitian, perhermitian, skew-perhermitian, and
persymmetric matrices, that can be considered structured analogs
of the Gershgorin sets. We also present the nonsingularity
conditions associated with these spectral inclusion sets.  Sets
that can be considered the structured analogs of the Brauer sets
are also briefly discussed.  Our techniques are general enough
to allow for other symmetries as well.