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Oscar Oscar Rojo Rojo

UNIVERSIDAD CATÓLICA DEL NORTE

Antofagasta, Chile


The distance Randic matrix of connected graphs Article Bulletin of the Brazilian Mathematical Society (2021)
On the minimal D-alpha- spectral radius of graphs subject to fixed connectivity Article ISI SCOPUS Linear Algebra and Its Applications (2020)
The maximal ??index of trees with k pendent vertices and its computation Article SCOPUS Electronic Journal of Linear Algebra (2020)
EFFECTS ON THE DISTANCE LAPLACIAN SPECTRUM OF GRAPHS WITH CLUSTERS BY ADDING EDGES Article ISI SCOPUS ELECTRONIC JOURNAL OF LINEAR ALGEBRA (2019)
New bounds on the distance Laplacian and distance signless Laplacian spectral radii Roberto C. Díaz; Ana I. Julio Article SCIELO Proyecciones (Antofagasta) - Revista de matemï¿½tica (2019)
New results on the D-alpha-matrix of connected graphs PastÃ©n G. Article ISI SCOPUS Linear Algebra and Its Applications (2019)
Distance matrices on the H-join of graphs: A general result and applications Cardoso D.M.; DÃaz R.C. Article ISI SCOPUS Linear Algebra and Its Applications (2018)
Sharp upper bounds on the distance energies of a graph Díaz, RC; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2018)
M-matrices with prescribed elementary divisors Article ISI SCOPUS INVERSE PROBLEMS (2017)
ON TREES WITH MAXIMUM ALGEBRAIC CONNECTIVITY Abreu N.; Markenzon L.; Lee L.; Rojo O. Article ISI SCOPUS APPLICABLE ANALYSIS AND DISCRETE MATHEMATICS (2016)
Effects on the Energy and Estrada Indices by Adding Edges Among Pendent Vertices Rojo O. Article ISI SCOPUS Match (2015)
Laplacian Spectrum, Laplacian-Energy-Like Invariant, and Kirchhoff Index of Graphs Constructed by Adding Edges on Pendent Vertices Pasten, G; Rojo O. Article ISI SCOPUS MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY (2015)
On the Faria's inequality for the Laplacian and signless Laplacian spectra: A unified approach Andrade E.; Cardoso D.M.; Pasten, G; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2015)
Ordering trees and graphs with few cycles by algebraic connectivity Abreu N.; Justel, CM; Rojo O.; Trevisan, V Article ISI SCOPUS Linear Algebra and Its Applications (2014)
A NEW UPPER BOUND ON THE LARGEST NORMALIZED LAPLACIAN EIGENVALUE Rojo O.; Soto R.L. Article ISI SCOPUS Operators and Matrices (2013)
A sharp upper bound on the incidence energy of graphs in terms of connectivity Rojo O.; Lenes E. Article ISI SCOPUS Linear Algebra and Its Applications (2013)
COPIES OF A ROOTED WEIGHTED GRAPH ATTACHED TO AN ARBITRARY WEIGHTED GRAPH AND APPLICATIONS Robbiano M.; Rojo O. Article ISI SCOPUS Electronic Journal of Linear Algebra (2013)
Eigenvalues of a H-generalized join graph operation constrained by vertex subsets Robbiano M.; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2013)
An upper bound on the largest signless Laplacian of an odd unicyclic graph Collao, M; Pizarro P.; Rojo O. Article SCIELO SCOPUS Proyecciones (Antofagasta) - Revista de matemï¿½tica (2012)
Construction of Bipartite Graphs Having the Same Randle Energy Rojo O.; Medina L. Article ISI MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY (2012)
Eigenvalues of certain weighted graphs joined at their roots having cliques at some levels Medina L.; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2012)
Algebraic connectivity on a subclass of caterpillars Rojo O.; Rocha, I; Trevisan, V Article SCOPUS ELECTRONIC NOTES IN DISCRETE MATHEMATICS (2011)
Line graph eigenvalues and line energy of caterpillars Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2011)
Line graph of combinations of generalized Bethe trees: Eigenvalues and energy Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2011)
ON NONNEGATIVE REALIZATION OF PARTITIONED SPECTRA Soto R.L.; Rojo O.; Manzaneda, CB Article ISI SCOPUS Electronic Journal of Linear Algebra (2011)
SPECTRA OF WEIGHTED ROOTED GRAPHS HAVING PRESCRIBED SUBGRAPHS AT SOME LEVELS Rojo O.; Robbiano M. Article ISI SCOPUS Electronic Journal of Linear Algebra (2011)
ALGEBRAIC CONNECTIVITY FOR SUBCLASSES OF CATERPILLARS Abreu N.; Rojo O.; Justel, C Article ISI SCOPUS Applicable Analysis and Discrete Mathematics (2010)
Energy of line graphs Gutman I.; Robbiano M.; Medina L.; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2010)
EXTREMAL ALGEBRAIC CONNECTIVITIES OF CERTAIN CATERPILLAR CLASSES AND SYMMETRIC CATERPILLARS Rojo O.; Medina L.; De Abreu, NMM; Justel, C Article ISI SCOPUS ELECTRONIC JOURNAL OF LINEAR ALGEBRA (2010)
On the algebraic connectivity of some caterpillars: A sharp upper bound and a total ordering Rojo O.; Medina L.; Abreu N.; Justel, C Article ISI SCOPUS Linear Algebra and Its Applications (2010)
Spectral characterization of some weighted rooted graphs with cliques Rojo O.; Medina L. Article ISI SCOPUS Linear Algebra and Its Applications (2010)
Computing tight upper bounds on the algebraic connectivity of certain graphs Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2009)
Constructing Graphs with Energy root rE(G) where G is a Bipartite Graph Rojo O.; Medina L. Article ISI MATCH-COMMUNICATIONS IN MATHEMATICAL AND IN COMPUTER CHEMISTRY (2009)
Guo perturbation for symmetric nonnegative circulant matrices Rojo O.; Soto R.L. Article ISI SCOPUS Linear Algebra and Its Applications (2009)
Maximizing the algebraic connectivity for a subclass of caterpillars Rojo O.; Medina L.; Abreu N.; Justel, C Article SCOPUS Electronic Notes in Discrete Mathematics (2009)
Spectra of copies of a generalized Bethe tree attached to any graph Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2009)
Spectra of generalized Bethe trees attached to a path Rojo O.; Medina L. Article ISI SCOPUS Linear Algebra and Its Applications (2009)
SPECTRA OF WEIGHTED COMPOUND GRAPHS OF GENERALIZED BETHE TREES Rojo O.; Medina L. Article ISI SCOPUS ELECTRONIC JOURNAL OF LINEAR ALGEBRA (2009)
A new algebra of Toeplitz-plus-Hankel matrices and applications Rojo O. Article ISI SCOPUS Computers and Mathematics with Applications (2008)
New upper bounds on the spectral radius of unicyclic graphs Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2008)
Spectra of weighted generalized Bethe trees joined at the root Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2008)
A nontrivial upper bound on the largest Laplacian eigenvalue of weighted graphs Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
An explicit formula for eigenvalues of Bethe trees and upper bounds on the largest eigenvalue of any tree Rojo O.; Robbiano M. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
Isospectral flows preserving some centrosymmetric structures Gladwell, GML; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
Isospectral flows that preserve matrix structure Gladwell, GML; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
On the spectra of some weighted rooted trees and applications Rojo O.; Robbiano M. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
On the sth Laplacian eigenvalue of trees of order st+1 Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
Symmetric nonnegative realization of spectra Soto R.L.; Rojo O.; Moro, J; Borobia, A Article ISI SCOPUS ELECTRONIC JOURNAL OF LINEAR ALGEBRA (2007)
The spectra of a graph obtained from copies of a generalized Bethe tree Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2007)
Applications of a Brauer theorem in the nonnegative inverse eigenvalue problem Soto R.L.; Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2006)
Inequalities involving the mean and the standard deviation of nonnegative real numbers Rojo O. Article ISI SCOPUS JOURNAL OF INEQUALITIES AND APPLICATIONS (2006)
On the spectra of certain rooted trees Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2006)
The spectra of some trees and bounds for the largest eigenvalue of any tree Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2006)
Tight bounds on the algebraic connectivity of Bethe trees Rojo O.; Medina L. Article ISI SCOPUS Linear Algebra and Its Applications (2006)
Improved bounds for the largest eigenvalue of trees Rojo O. Article ISI SCOPUS Linear Algebra and Its Applications (2005)
The spectra of the adjacency matrix and Laplacian matrix for some balanced trees Rojo O.; Soto R. Article ISI SCOPUS Linear Algebra and Its Applications (2005)
A decreasing sequence of upper bounds on the largest Laplacian eigenvalue of a graph Rojo O.; Rojo, H Article ISI SCOPUS Linear Algebra and Its Applications (2004)
Some results on symmetric circulant matrices and on symmetric centrosymmetric matrices Rojo O.; Rojo, H Article ISI SCOPUS Linear Algebra and Its Applications (2004)
THE SPECTRUM OF THE LAPLACIAN MATRIX OF A BALANCED 2p-ARY TREE Rojo, Oscar Article SCIELO Proyecciones (Antofagasta) - Revista de matemï¿½tica (2004)
A note on the integer eigenvalues of the Laplacian matrix of a balanced binary tree Rojo O.; Pena M. Article ISI SCOPUS Linear Algebra and Its Applications (2003)
Constructing symmetric nonnegative matrices via the fast Fourier transform Rojo O.; Rojo, H Article ISI SCOPUS Computers and Mathematics with Applications (2003)
Existence and construction of nonnegative matrices with complex spectrum Rojo O.; Soto R.L. Article ISI SCOPUS Linear Algebra and Its Applications (2003)
The spectrum of the Laplacian matrix of a balanced binary tree Rojo O. Article ISI Linear Algebra and Its Applications (2002)
A note on the construction of a positive oscillatory matrix with a prescribed spectrum Rojo O.; Soto R.; Egaña, J Article ISI SCOPUS Computers and Mathematics with Applications (2001)
Fast construction of a symmetric nonnegative matrix with a prescribed spectrum Rojo O.; Soto R.; Rojo, H Article ISI SCOPUS Computers and Mathematics with Applications (2001)
An always nontrivial upper bound for Laplacian graph eigenvalues Rojo O.; Soto R.; Rojo, H Article ISI SCOPUS Linear Algebra and Its Applications (2000)
Bounds for sums of eigenvalues and applications Rojo O.; Soto R.; Rojo, H Article ISI SCOPUS Computers and Mathematics with Applications (2000)

Oscar Rojo

UNIVERSIDAD CATÓLICA DEL NORTE

Antofagasta, Chile

Ricardo Soto

Académico

Matemáticas

Universidad Católica del Norte

Antofagasta, Chile

María Robbiano

UNIVERSIDAD CATÓLICA DEL NORTE

Antofagasta, Chile

Luis Medina

Profesor Asociado

UNIVERSIDAD DE ANTOFAGASTA

Antofagasta, Chile

Oscar Oscar Rojo Rojo

Líneas de Investigación

Article (67)