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Showing results 1 to 20 of 23.
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Issue Date
Title
Author(s)
Type
Access
1-Aug-2001
About the von Neumann regularity of triangular block matrices
Patrício, Pedro
;
Puystjens, Roland
Article
Open access
15-May-2005
Diagonalizing triangular matrices via orthogonal Pierce decompositions
Hartwig, Robert E.
;
Patrício, Pedro
;
Puystjens, Roland
Article
Open access
15-May-2005
The doubly negative matrix completion problem
Araújo, C. Mendes
;
Torregrosa, Juan R.
;
Urbano, Ana M.
Article
Open access
2004
Drazin-Moore-Penrose invertibility in rings
Patrício, Pedro
;
Puystjens, Roland
Article
Open access
2015
Eigenvectors of isospectral graph transformations
Duarte, P.
;
Torres, M. J.
Article
Restricted access (UMinho)
15-Jan-2004
Generalized invertibility in two semigroups of a ring
Patrício, Pedro
;
Puystjens, Roland
Article
Open access
2003
The Moore-Penrose inverse of a factorization
Patrício, Pedro
Article
Open access
1-Aug-2001
The Moore-Penrose inverse of von Neumann regular matrices over a ring
Patrício, Pedro
Article
Open access
2018
Multiplicity lists for symmetric matrices whose graphs have few missing edges
Johnson, Charles R.
;
Zhang, Yulin
Article
Open access
1-Oct-2003
N-matrix completion problem
Araújo, C. Mendes
;
Torregrosa, Juan R.
;
Urbano, Ana M.
Article
Open access
15-Mar-2004
The N-matrix completion problem under digraphs assumptions
Araújo, C. Mendes
;
Torregrosa, Juan R.
;
Urbano, Ana M.
Article
Open access
Oct-2019
On a class of nonsingular matrices containing B-matrices
Araújo, C. Mendes
;
Gonçalves, Suzana Mendes
Article
Open access
2015
On mappings preserving the sharp and star orders
Burgos, M.
;
Márquez-García, A. C.
;
Patrício, Pedro
Article
Open access
2005
On the number of invariant factors of matrix products
Sá, E. Marques de
;
Zhang Yu Lin
Article
Open access
2009
Sign pattern matrices that admit M-, N-, P- or inverse M-matrices
Araújo, C. Mendes
;
Torregrosa, Juan R.
Article
Open access
Oct-2011
Sign pattern matrices that admit P_0-matrices
Araújo, C. Mendes
;
Torregrosa, Juan R.
Article
Open access
2014
Some results on B-matrices and doubly B-matrices
Araújo, C. Mendes
;
Torregrosa, Juan R.
Article
Open access
1-Sep-2005
The symmetric N-matrix completion problem
Araújo, C. Mendes
;
Torregrosa, Juan R.
;
Urbano, Ana M.
Article
Open access
2012
The (2,2,0) drazin inverse problem
Patrício, Pedro
;
Hartwig, Robert E.
Article
Open access
2012
The Moore-Penrose inverse of a companion matrix
Patrício, Pedro
Article
Open access