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.

Vol. 39 (2023)

Published: 2023-02-09

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

Swastika Saha Mondal, Sarita Ojha, Riddhick Birbonshi


The maximum spectral radius of graphs with a large core

Xiaocong He, Lihua Feng, Dragan Stevanović


The inverse Horn problem

João Filipe Queiró, Ana Paula Santana


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

I. Jeyaraman, T. Divyadevi, R. Azhagendran


On low-dimensional partial isometries

Qixiao He, Ilya Spitkovsky, Ibrahim Suleiman


Products of skew-involutions

Jesus Paolo Joven, Agnes Paras


On the numerical range of Kac-Sylvester matrices

Natália Bebiano, Rute Lemos, Graça Soares


Multi-alternating sign matrices

Richard Brualdi, Geir Dahl


Positive and negative square energies of graphs

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


Nullities of cycle-spliced bipartite graphs

Sarula Chang, Jianxi Li, Yirong Zheng


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

Jelena Visnjic, Ivana Stanisev, Yuanyuan Ke


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


Periodic two-dimensional descriptor systems

Peter Benner, Paul Van Dooren


Unicyclic graphs and the inertia of the squared distance matrix

Christian Howell, Mark Kempton, Kellon Sandall, John Sinkovic


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