Spectrally arbitrary zero-nonzero patterns of order 4

Author: Corpuz L.   McDonald J. J.  

Publisher: Taylor & Francis Ltd

ISSN: 0308-1087

Source: Linear and Multilinear Algebra, Vol.55, Iss.3, 2007-05, pp. : 249-273

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Abstract

In this article the authors characterize all the 4×4 zero-nonzero patterns that are spectrally arbitrary. Several observations and conjectures are presented for the n × n case.