MathSciNet bibliographic data MR2862116 15A24 (65F35) Duan, Xuefeng; Li, Chunmei; Liao, Anping Solutions and perturbation analsis for the nonlinear matrix equation $X+\sum^m_{i=1}A^\ast_iX^{-1}A_i=I$$X+\sum^m_{i=1}A^\ast_iX^{-1}A_i=I$. Appl. Math. Comput. 218 (2011), no. 8, 4458–4466. Article

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