Some investigation on Hermitian positive-definite solutions of a nonlinear matrix equation

被引:4
|
作者
Pei, Weijuan [1 ]
Wu, Guoxing [1 ]
Zhou, Duanmei [2 ]
Liu, Yitian [1 ]
机构
[1] Northeast Forestry Univ, Dept Math, Harbin 150040, Peoples R China
[2] E China Normal Univ, Dept Math, Shanghai 200241, Peoples R China
关键词
nonlinear matrix equation; Hermitian positive-definite solution; necessary and sufficient condition; iteration; SUFFICIENT CONDITIONS; EXISTENCE; X-S+A-ASTERISK-X(-T)A;
D O I
10.1080/00207160.2013.819425
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
In this paper, the Hermitian positive-definite solutions of the matrix equation X-s + A*X(-t)A = Q are considered. New necessary and sufficient conditions for the equation to have a Hermitian positive-definite solution are derived. In particular, when A is singular, a new estimate of Hermitian positive-definite solutions is obtained. In the end, based on the fixed point theorem, an iterative algorithm for obtaining the positive-definite solutions of the equation with Q = I is discussed. The error estimations are found.
引用
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页码:872 / 880
页数:9
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