The number of P-vertices in a matrix with maximum nullity

Let T be a tree with n >= 2 vertices. Set 8(T) for the set of all real symmetric matrices whose graph is T. Let A is an element of S(T) and i is an element of {1, . . . , n}. We denote by A(i) the principal submatrix of A obtained after deleting the row and column i. We set m(A) (0) for the multi...

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Detalhes bibliográficos
Autor principal: Fernandes, Maria do Rosário Silva Franco (author)
Outros Autores: da Cruz, Henrique F. (author)
Formato: article
Idioma:eng
Publicado em: 2019
Assuntos:
Texto completo:http://hdl.handle.net/10362/64137
País:Portugal
Oai:oai:run.unl.pt:10362/64137