MathSciNet bibliographic data MR1855392 65F99 (15A24 65H10) Xu, Shu-Fang Perturbation analysis of the maximal solution of the matrix equation \$X+A\sp *X\sp {-1}A=P\$$X+A\sp *X\sp {-1}A=P$. Linear Algebra Appl. 336 (2001), 61–70. Article

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