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A System of Coupled Quaternion Matrix Equations with Seven Unknowns and Its Applications

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Abstract

In this paper, a system of coupled quaternion matrix equations with seven unknowns

$$\begin{aligned} A_{i}X_{i}+Y_{i}B_{i}+C_{i}Z_{i}D_{i}+F_{i}WG_{i}=E_{i} \end{aligned}$$

is considered, where \(A_{i},B_{i},C_{i},D_{i},F_{i},G_{i}\) and \(E_{i}\) are given matrices, \(X_{i},Y_{i},Z_{i}\) and W are unknowns \((i=1,2)\). Some practical necessary and sufficient conditions for the existence of a solution to this system in terms of ranks and Moore–Penrose inverses are provided. The general solution to the system is given when the solvability conditions are satisfied. Applications that are discussed include the solvability conditions and general solutions to some quaternion matrix equations involving \(\phi \)-Hermicity. Some examples are given to illustrate the main results.

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Acknowledgements

The author would like to thank the anonymous referees for their valuable suggestions.

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Correspondence to Zhuo-Heng He.

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Communicated by Pierre-Philippe Dechant

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This research was supported by the National Natural Science Foundation of China (Grant no. 11801354).

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He, ZH. A System of Coupled Quaternion Matrix Equations with Seven Unknowns and Its Applications. Adv. Appl. Clifford Algebras 29, 38 (2019). https://doi.org/10.1007/s00006-019-0955-2

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