Diagonal entries of the combined matrix of sign regular matrices of order three
Keywords:Sign regular matrices, Combined matrices , Hadamard product
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.
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Copyright (c) 2021 Maria T. Gassó, Iv´an Gil, Isabel Giménez, M´aximo Santana, Elaine Segura
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