Diagonal entries of the combined matrix of sign regular matrices of order three
Author
Gassó, Maria T.
Gil, Iv´an
Giménez, Isabel
Santana, M´aximo
Segura, Elaine
Full text
https://www.revistaproyecciones.cl/index.php/proyecciones/article/view/443710.22199/issn.0717-6279-2021-01-0016
Abstract
The study of the diagonal entries of the combined matrix of a nonsingular matrix A has been considered by different authors for the classes of M—matrices, positive definite matrices and totally positive (negative) matrices. This problem appears to be difficult as the results have been done only for matrices of order three. In this work, we continue to give the characterization of the diagonal entries of the combined matrix of the remainder sign regular matrices. Thus, the problem is closed for all possible sign regular matrices of order three.