4BRADEN H. The equations A^TX ± X^TA = B[ J ]. Matrix Anal Appl, 1998, 20:295-302.
5XU Qingxiang, SHENG Lijuan, GU Yangyang. The solutions to some operator equations [ J ]. Linear Algebra and its applica- tions, 2008, 429 : 1997-2024.
6BHATIA R. Matrix analysis [M]. New York: Springer-Verlag, 1997.
7CONWAY J B. A course in functional analysis[M]. New York: Springer-Verlag, 1990.
8BEN I A. The Moore of the Moore-Penrose inverse [J]. Electronic Journal of Linear Algebra, 2002, 9:150-157.
9FILLMORE L R, WILLIAMS J P. On operator ranges[J]. Advances in Mathematics, 1971, 7: 254-281.
10CHU K W E. Symmetric solutions of linear matrix equation by matrix decompositions[J]. Linear Algebra and Appl, 1989, 119:35--50.
