Resumen: 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. Idioma: Inglés DOI: 10.1016/j.cam.2020.113121 Año: 2022 Publicado en: Journal of Computational and Applied Mathematics 404 (2022), 113121 ISSN: 0377-0427 Factor impacto JCR: 2.4 (2022) Categ. JCR: MATHEMATICS, APPLIED rank: 45 / 267 = 0.169 (2022) - Q1 - T1 Factor impacto CITESCORE: 5.4 - Mathematics (Q1)