The Electronic Journal of Linear Algebra (ELA), a publication of the International Linear Algebra Society (ILAS), is a refereed all-electronic journal that welcomes mathematical articles of high standards that contribute new information and new insights to matrix analysis and the various aspects of linear algebra and its applications. ELA is a JCR ranked journal, and indexed by MathSciNet, ZentralBlatt, and Scopus.  ELA is completely free for authors/readers; and  ELA is built on the selfless contributions of its authors, referees and editors.

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Current Issue

Vol. 39 (2023)

Published: 2023-02-09

Article

Minimal rank weak Drazin inverses: a class of outer inverses with prescribed range

Cang Wu, Jianlong Chen

1-16

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Flat portions on the boundary of the numerical range of a 5 × 5 companion matrix

Swastika Saha Mondal, Sarita Ojha, Riddhick Birbonshi

17-32

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Hypocoercivity and hypocontractivity concepts for linear dynamical systems

Franz Achleitner, Anton Arnold, Volker Mehrmann

33-61

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The Graham-Hoffman-Hosoya-type theorems for the exponential distance matrix

Zhibin Du, Rundan Xing

62-70

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A permanent inequality for positive semidefinite matrices

Vehbi E. Paksoy

71-77

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The maximum spectral radius of graphs with a large core

Xiaocong He, Lihua Feng, Dragan Stevanović

78-89

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The inverse Horn problem

João Filipe Queiró, Ana Paula Santana

90-93

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The Moore-Penrose inverse of the distance matrix of a helm graph

I. Jeyaraman, T. Divyadevi, R. Azhagendran

94-109

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Linear maps that preserve parts of the spectrum on pairs of similar matrices

Constantin Costara

110-116

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Fields of U-invariants of matrix tuples

Aleksandr Panov

117-123

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On low-dimensional partial isometries

Qixiao He, Ilya Spitkovsky, Ibrahim Suleiman

124-135

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Products of skew-involutions

Jesus Paolo Joven, Agnes Paras

136-150

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The matrix inverse Young inequality

Stephen Drury

151-153

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Centered PSD matrices with thin spectrum are M-matrices

Karel Devriendt

154-163

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Adapted AZNN methods for time-varying and static matrix problems

Frank Uhlig

164-180

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Relation between the row left rank of a quaternion unit gain graph and the rank of its underlying graph

Qiannan Zhou, Yong Lu

181-198

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Refinement of von Neumann-type inequalities on product Eaton triples

Marek Niezgoda

199-213

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Expressions and characterizations for the Moore-Penrose inverse of operators and matrices

Patricia Morillas

214-241

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On the numerical range of Kac-Sylvester matrices

Natália Bebiano, Rute Lemos, Graça Soares

242-259

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Multi-alternating sign matrices

Richard Brualdi, Geir Dahl

260-281

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Graph degeneracy and orthogonal vector representations

Lon Mitchell

282-285

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Bounding real tensor optimizations via the numerical range

Nathaniel Johnston, Logan Pipes

286-306

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Positive and negative square energies of graphs

Aida Abiad, Leonardo de Lima, Dheer Desai, Krystal Guo, Leslie Hogben, José Madrid

307-326

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Nullities of cycle-spliced bipartite graphs

Sarula Chang, Jianxi Li, Yirong Zheng

327-338

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Extremal problems for the eccentricity matrices of complements of trees

Iswar Mahato, M. Rajesh Kannan

339-354

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A new method to improve the efficiency and accuracy of incremental singular value decomposition

Hansi Jiang, Arin Chaudhuri

355-378

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Reverse order law and forward order law for the (b, c)-inverse

Jelena Visnjic, Ivana Stanisev, Yuanyuan Ke

379-394

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Preservers of the p-power and the Wasserstein means on 2x2 matrices

Richárd Simon, Dániel Virosztek

395-408

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On the sum of the k largest absolute values of Laplacian eigenvalues of digraphs

Xiuwen Yang, Xiaogang Liu, Ligong Wang

409-422

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Pareto H-eigenvalues of nonnegative tensors and uniform hypergraphs

Lu Zheng, Bo Zhou

423-433

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Orthogonal realizations of random sign patterns and other applications of the SIPP

Zachary Brennan, Christopher Cox, Bryan Curtis, Enrique Gomez-Leos, Kimberly Hadaway, Leslie Hogben, Conor Thompson

434-459

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Decompositions of matrices into a sum of invertible matrices and matrices of fixed nilpotence

Peter Danchev, Esther García, Miguel Gómez Lozano

460-471

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Periodic two-dimensional descriptor systems

Peter Benner, Paul Van Dooren

472-490

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Unicyclic graphs and the inertia of the squared distance matrix

Christian Howell, Mark Kempton, Kellon Sandall, John Sinkovic

491-515

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On condition numbers of quaternion matrix inverse and quaternion linear systems with multiple right-hand sides

Qiaohua Liu, Shan Wang, Fengxia Zhang

516-532

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The inverse of a symmetric nonnegative matrix can be copositive

Robert Reams

533-538

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