四元数体上离散型 Ly apunov 方程的反问题解
On Inverse Problem of the Discrete Lyapunov Equation Over Quaternion Field
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摘要: 利用自共轭四元数矩阵的酉对角分解和正负惯性指数为工具,刻划了四元数体上离散型 Lyapunov方程AXA*-X= F的反问题有解的充要条件,并得到解 A的具体表达式。同时,给出该方程在酉矩阵约束条件下的解和最小二乘解。推广了对称双侧正交Procrustes问题。
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关键词:
- 四元数体 /
- 离散型Lyapunov方程 /
- 反问题 /
- 最小二乘解
Abstract: In this paper ,we have used diagonalization method and inertial exponent of a self‐conjugate qua‐ternion matrix ,the necessary and sufficient conditions for the existence a solution of inverse problem of the discrete Lyapunov equation AXA* -X= F over quaternion field have been given ,and obtain the expres‐sion of general solution A .Meanwhile ,the least squares solution of the equation in quaternion unitary ma‐trices set has been presented .We have generalized the Procrustes problem with bilateral orthogonal . -
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