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Highly symmetric generalized circulant permutation matrices

โœ Scribed by M. Abreu; D. Labbate; R. Salvi; N. Zagaglia Salvi

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
117 KB
Volume
429
Category
Article
ISSN
0024-3795

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Guo [W. Guo, Eigenvalues of nonnegative matrices, Linear Algebra Appl. 266 (1997) 261-270] sets the question: if the list ฮ› = {ฮป 1 , ฮป 2 , . . . , ฮป n } is symmetrically realizable (that is, ฮ› is the spectrum of a symmetric nonnegative matrix), and t > 0, whether or not the list ฮ› t = {ฮป 1 + t, ฮป 2