The structure of matrices with a maximum multiplicity eigenvalue

There is remarkable and distinctive structure among Hermitian matrices, whose graph is a given tree T and that have an eigenvalue of multiplicity that is a maximum for T. Among such structure, we give several new results: (1) no vertex of T may be "neutral"; (2) neutral vertices may occur...

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Detalhes bibliográficos
Autor principal: Johnson, Charles R. (author)
Outros Autores: Duarte, António Leal (author), Saiago, Carlos M. (author)
Formato: article
Idioma:eng
Publicado em: 2008
Assuntos:
Texto completo:http://hdl.handle.net/10316/4579
País:Portugal
Oai:oai:estudogeral.sib.uc.pt:10316/4579