## Taiwanese Journal of Mathematics

### ON POSITIVE DEFINITE SOLUTIONS OF THE MATRIX EQUATION $X+A∗X^{-q}A=Q(0 \lt q ≤ 1)$

#### Abstract

Consider the nonlinear matrix equation $X+A^{*}X^{-q}A = Q$ where $0 \lt q \leq 1$. A new sufficient condition for this equation to have positive definite solution is provided and two iterative methods for the maximal positive definite solution are proposed. Applying the theory of condition number developed by Rice, an explicit expression of the condition number of the maximal positive definite solution is obtained. The theoretical results are illustrated by numerical examples.

#### Article information

Source
Taiwanese J. Math., Volume 16, Number 4 (2012), 1391-1407.

Dates
First available in Project Euclid: 18 July 2017

https://projecteuclid.org/euclid.twjm/1500406740

Digital Object Identifier
doi:10.11650/twjm/1500406740

Mathematical Reviews number (MathSciNet)
MR2951144

#### Citation

Yin, Xiaoyan; Liu, Sanyang; Li, Tiexiang. ON POSITIVE DEFINITE SOLUTIONS OF THE MATRIX EQUATION $X+A∗X^{-q}A=Q(0 \lt q ≤ 1)$. Taiwanese J. Math. 16 (2012), no. 4, 1391--1407. doi:10.11650/twjm/1500406740. https://projecteuclid.org/euclid.twjm/1500406740

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