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Volume 30 (2015)

Articles

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Using variants of zero forcing to bound the inertia set of a graph
Steve Butler, Jason Grout, and H. Tracy Hall

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Real nullstellensatz and *-ideals in *-algebras
J. Cimpric, J W. Helton, S. McCullough, and C. Nelson

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On the multiplicities of eigenvalues of graphs and their vertex deleted subgraphs: old and new results
Slobodan K. Simic, Milica Andelic, Carlos M. Da Fonseca, and Dejan Zivkovic

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Further results on generalized inverses in rings with involution
N. Castro-Gonzalez, Jianlong Chen, and Long Wang

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The Dirichlet spectral radius of trees
Guang-jun Zhang and Wei-Xia Li

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Generalization of Gracia's Results
Jun Liao, Heguo Liu, Yulei Wang, Zuohui Wu, and Xingzhong Xu

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Factorization of Permutations
Zejun Huang, Chi-Kwong Li, Sharon H. Li, and Nung-Sing Sze

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Evaluation of a family of binomial determinants
Charles Helou and James A. Sellers

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Minimum ranks of sign patterns via sign vectors and duality
Marina Arav, Frank Hall, Zhongshan Li, Hein van der Holst, John Henry Sinkovic, and Lihua Zhang

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Combinatorial properties of generalized M-matrices
Manideepa Saha and Sriparna Bandopadhyay

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Extremal graphs for the sum of the two largest signless Laplacian eigenvalues
Carla Silva Oliveira, Leonado de Lima, Paula Rama, and Paula Carvalho

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Minimization problems for certain structured matrices
Zhongyun Liu, Rui Ralha, Yulin Zhang, and Carla Ferreira

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On Wilkinson's problem for matrix pencils
Sk. Safique Ahmad and Rafikul Alam

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Nonnegative generalized doubly stochastic matrices with prescribed elementary divisors
Ricardo L. Soto, Elvis Valero, Mario Salas, and Hans Nina

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Representations and sign pattern of the group inverse for some block matrices
Lizhu Sun, Wenzhe Wang, Changjiang Bu, Yimin Wei, and Baodong Zheng

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Maxima of the signless Laplacian spectral radius for planar graphs
Guanglong Yu, Jianyong Wong, and Shu-guang Guo

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Convergence on Gauss-Seidel iterative methods for linear systems with general H-matrices
Cheng-yi Zhang, Dan Ye, Cong-Lei Zhong, and SHUANGHUA SHUANGHUA

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Higher numerical ranges of quaternion matrices
Narjes Haj Aboutalebi, Gholamreza Aghamollaei, and Hossein Momenaee Kermani

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On the Robust Stability of Polynomial Matrix Families
Taner Buyukkoroglu, Gokhan Celebi, and Vakif Dzhafarov

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The numerical radius of a weighted shift operator
Batzorig Undrakh, Hiroshi Nakazato, Adiyasuren Vandanjav, and Mao-Ting Chien