MathSciNet bibliographic data MR2152339 15A24 Zhang, Yu-hai On Hermitian positive definite solutions of matrix equation \$X-A\sp *X\sp {-2}A=I\$$X-A\sp *X\sp {-2}A=I$. J. Comput. Math. 23 (2005), no. 4, 408–418. Journal

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