Eventually: When Necessity Turns into Sufficiency
22/01/2010 Sexta-feira, 22 de Janeiro de 2010, 14h30, Anfiteatro
Charles R. Johnson (College of William and Mary, USA) http://www.as.wm.edu/Faculty/Johnson.html
We survey several recent results about classes of matrices for
which it is somewhat difficult to check membership, but for which there is
an obvious necessary condition that becomes sufficient "eventually" in terms
of some continuous "powering" One example is the recent result that the
matrices that are totally positive after a sufficiently high Hadamard power
are just the TP2 matrices.
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