QR decomposition of almost strictly sign regular matrices

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摘要

In this paper, LDU factorization of nonsingular sign regular and almost strictly sign regular matrices is analyzed. Besides, nonsingular almost strictly sign regular matrices are characterized through the QR factorization. Illustrative numerical examples are included.

论文关键词：65F05,65F15,65F35,Sign regular matrices,Almost strictly sign regular matrices,LDU factorization,QR factorization

论文评审过程：Received 26 June 2015, Revised 28 October 2015, Available online 10 November 2015, Version of Record 27 January 2017.

论文官网地址：https://doi.org/10.1016/j.cam.2015.10.030