利用埃尔米特广义反汉密尔顿半正定矩阵的表示定理,作者建立了线性矩阵方程在埃尔米特广义反汉密尔顿半正定矩阵集合中可解的充分必要条件,得到了解的一般表达式。对于逆特征值问题,也得到了可解的充分必要条件。对于任意一个礼阶复矩阵,得到了相关最佳逼近问题解的表达式。
By means of the properties of Hermitian generalized anti-Hamiltonian semi-definite matrices, the authors give some necessary and sufficient conditions for the solvability of the linear matrix equation in Hermitian generalized anti-Hamiltonian semi-definite matrix set, and obtain a general expression of the solution for a solvable case. The authors also give some nec- essary and sufficient conditions of the solvability for inverse enginvalume problem of Hermitian generalized anti-Hamiltonian semi-definite matrices. For any n×n complex matrix, the authors derive the representation of its unique optimal approximation.