Spectra of principal submatrices of nonn
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Thomas J. Laffey; Helena ล migoc
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Article
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2008
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Elsevier Science
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English
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Let A be an n ร n nonnegative matrix with the spectrum (ฮป 1 , ฮป 2 , . . . , ฮป n ) and let A 1 be an m ร m principal submatrix of A with the spectrum (ฮผ 1 , ฮผ 2 , . . . , ฮผ m ). In this paper we present some cases where the realizability of (ฮผ 1 , ฮผ 2 , . . . , ฮผ m , ฮฝ 1 , ฮฝ 2 , . . . , ฮฝ s ) implies