Home > ELA > Vol. 30 (2015)

## Volume 30 (2015)

## Articles

Using variants of zero forcing to bound the inertia set of a graph

Steve Butler, Jason Grout, and H. Tracy Hall

Real nullstellensatz and *-ideals in *-algebras

J. Cimpric, J W. Helton, S. McCullough, and C. Nelson

Extension of Bessel sequences to oblique dual frame sequences and the minimal projection

Yoo Young Koo and Jae Kun Lim

A norm inequality for pairs of commuting positive semidefinite matrices

Koenraad MR Audenaert

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

A total positivity property of the Marchenko-Pastur Law

Ana Marco and Jose-Javier Martinez

Further results on generalized inverses in rings with involution

N. Castro-Gonzalez, Jianlong Chen, and Long Wang

On the Laplacian characteristic polynomials of mixed graphs

Dariush Kiani and Maryam Mirzakhah

The Dirichlet spectral radius of trees

Guang-jun Zhang and Wei-Xia Li

Finite and infinite structures of rational matrices: a local approach

A. Amparan, S. Marcaida, and Ion Zaballa

Properties of first eigenvectors and eigenvalues of nonsingular weighted directed graphs

Debajit Kalita

Generalization of Gracia's Results

Jun Liao, Heguo Liu, Yulei Wang, Zuohui Wu, and Xingzhong Xu

Common reducing unitary subspaces and decoherence in quantum systems

Grzegorz Pastuszak and Andrzej Jamiołkowski

Note on the Jordan form of an irreducible eventually nonnegative matrix

Leslie Hogben, Bit-Shun Tam, and Ulrica Wilson

Factorization of Permutations

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

Some Properties of the Exchange Operator with respect to Structured Matrices defined by Indefinite Scalar Product Spaces

Hanz Martin C. Cheng and Roden Jason David

Evaluation of a family of binomial determinants

Charles Helou and James A. Sellers

On Derivatives and Norms of Generalized Matrix Functions and Respective Symmetric Powers

Sonia Carvalho and Pedro J. Freitas

Inversion of centroskewsymmetric Toeplitz-plus-Hankel Bezoutians

Karla Rost and Torsten Ehrhardt

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

An Iterative algorithm for $\eta$-(anti)-Hermitian least-squares solutions of quaternion matrix equations

Fatemeh Panjeh Ali Beik and Salman Ahmadi-Asl

Recent results on the majorization theory of graph spectrum and topological index theory

Muhuo Liu, Bolian Liu, and Kinkar Ch. Das

Rank drops of recurrence matrices

Sebastian Bozlee

The Laplacian quadratic form and edge connectivity of a graph

William E. Watkins

Signless Laplacian spectral characterization of some joins

Xiaogang Liu and Pengli Lu

Pseudo Schur complements, pseudo principal pivot transforms and their inheritance properties

K. C. Sivakumar, Ravindran G., and Kavita Bisht

Conjugacy classes of torsion in GL_n(Z)

Qingjie Yang

Wave Packet Transform over Finite Fields

Arash Ghaani Farashahi

Invertible and regular completions of operator matrices

Dragana S. Cvetkovic-Ilic

Combinatorial properties of generalized M-matrices

Manideepa Saha and Sriparna Bandopadhyay

Remarks on an operator Wielandt Inequality

Pingping Zhang

Spectral Bounds for Matrix Polynomials with Unitary Coefficients

Thomas R. Cameron

An improved estimate for the condition number anomaly of univariate Gaussian correlation matrices

Ralf Zimmermann

Extremal graphs for the sum of the two largest signless Laplacian eigenvalues

Carla Silva Oliveira, Leonado de Lima, Paula Rama, and Paula Carvalho

Minimization problems for certain structured matrices

Zhongyun Liu, Rui Ralha, Yulin Zhang, and Carla Ferreira

On Wilkinson's problem for matrix pencils

Sk. Safique Ahmad and Rafikul Alam

Spectral Properties of Finite-dimensional Waveguide Systems

Nurhan Colakoglu and Peter Lancaster

Line segments on the boundary of the numerical ranges of some tridiagonal matrices

Ilya M. Spitkovsky and Claire Marie Thomas

Nonnegative generalized doubly stochastic matrices with prescribed elementary divisors

Ricardo L. Soto, Elvis Valero, Mario Salas, and Hans Nina

Solving the real eigenvalues of hermitian quadratic eigenvalue problems via bisection

Hao Li and Yunfeng Cai

Representations and sign pattern of the group inverse for some block matrices

Lizhu Sun, Wenzhe Wang, Changjiang Bu, Yimin Wei, and Baodong Zheng

Sign Characteristics of Regular Hermitian Matrix Pencils under Generic Rank-1 and Rank-2 Perturbations

Leonhard Batzke

Maxima of the signless Laplacian spectral radius for planar graphs

Guanglong Yu, Jianyong Wong, and Shu-guang Guo

On the Main Eigenvalues of Universal Adjacency Matrices and U-Controllable Graphs

Alexander Farrugia and Irene Sciriha

The absorption laws for the generalized inverses in rings

Hongwei Jin and Julio Benitez

Convergence on Gauss-Seidel iterative methods for linear systems with general H-matrices

Cheng-yi Zhang, Dan Ye, Cong-Lei Zhong, and SHUANGHUA SHUANGHUA

Matrices of minimum norm satisfying certain prescribed band and spectral restrictions -- an extremal characterization of the discrete periodic Laplacian

Marcos V. Travaglia

Higher numerical ranges of quaternion matrices

Narjes Haj Aboutalebi, Gholamreza Aghamollaei, and Hossein Momenaee Kermani

On the Robust Stability of Polynomial Matrix Families

Taner Buyukkoroglu, Gokhan Celebi, and Vakif Dzhafarov

On the invertibility of length two elementary operators

Janko Bracic and Nadia Boudi

A Lagrange series approach to the spectrum of the Kite

Piet Van Mieghem

The numerical radius of a weighted shift operator

Batzorig Undrakh, Hiroshi Nakazato, Adiyasuren Vandanjav, and Mao-Ting Chien

Application of an identity for subtrees with a given eigenvalue

Kenji Toyonaga and Charles R. Johnson