研究了矩阵方程(AXA^T,BXB^T)=(C,D)的双对称解及其最佳逼近解,及相应的最小二乘解问题。得到了方程有解的充要条件,并给出了解的一般表达式和最佳逼近解的表达式,及其最小二乘解。
The solutions, the best approximation solutions and least-square solutions of matrix equation (AXA^T ,BXB^T) = (C,D) over bisymmetric matrices are studied. Necessary and sufficient conditions for the existence of the solutions, are gaimed the general forms of the solutions, the best approximation solutions and the least-square solutions are derived.