Algorithmic characterization of pentadiagonal ASSR matrices. Issue 1 (1st February 2020)

• Record Type: Journal Article
• Authors: Alonso, P.; Peña, J. M.; Serrano, M. L.
• Is Part Of: International journal of computer mathematics. Volume 97:Issue 1/2(2020)
• Page Start: 431
• Page End: 443
• Publication Date: 2020-02-01
• Subjects: Pentadiagonal matrices -- almost strictly sign regular matrices -- algorithmic characterization; 15B35; Computers -- Periodicals; Numerical analysis -- Periodicals; Automation -- Periodicals; 004.0151
• DOI: 10.1080/00207160.2019.1642470
• Languages: English
• ISSNs: 0020-7160

Abstract

ABSTRACT: A matrix is sign regular if all its minors of the same order are of the same sign. A very important subclass of sign regular matrices is formed by those matrices whose non-trivial minors are non-zero. These matrices are called almost strictly sign regular matrices. In this work, an algorithmic characterization of pentadiagonal almost strictly sign regular matrices is presented.