Bulletin of the
Korean Mathematical Society BKMS

In this paper, we mainly consider the determinantal representations of the unique solution and the general solution to the restricted system of quaternion matrix equations \[ \left\{ \begin{array} [c]{c} A_{1}X=C_{1}\\ XB_{2}=C_{2}, \end{array} \right. \mathcal{R}_{r}\left( X\right) \subseteq T_{1},\text{ } \mathcal{N}_{r}\left( X\right) \supseteq S_{1}, \] respectively. As an application, we show the determinantal representations of the general solution to the restricted quaternion matrix equation \[ AX+YB=E,\text{ }\mathcal{R}_{r}\left( X\right) \subseteq T_{1},\text{ }\mathcal{N}_{r}\left( X\right) \supseteq S_{1},\text{ }\mathcal{R} _{l}\left( Y\right) \subseteq T_{2},\text{ }\mathcal{N}_{l}\left( Y\right) \supseteq S_{2}. \] The findings of this paper extend some known results in the literature.

Keywords: quaternion matrix, Cramer's rule, determinant

MSC numbers: 15A09, 15A24