Almost strictly sign regular matrices are sign regular matrices with a special zero pattern and whose nontrivial minors are nonzero. In this paper we provide several properties of almost strictly sign regular rectangular matrices of maximal rank and analyze their QR factorization. (C)& nbsp;2020 Elsevier B.V. All rights reserved.
Key words
Almost strictly sign regular rectangular/matrices/QR factorization
NSTL
Elsevier