Yin, Feng; Huang, Guang-Xin An iterative algorithm for the least squares generalized reflexive solutions of the matrix equations \(AXB = E\), \(CXD = F\). (English) Zbl 1242.65085 Abstr. Appl. Anal. 2012, Article ID 857284, 18 p. (2012). Summary: The generalized coupled Sylvester systems play a fundamental role in wide applications in several areas, such as stability theory, control theory, perturbation analysis, and some other fields of pure and applied mathematics. The iterative method is an important way to solve the generalized coupled Sylvester systems. In this paper, an iterative algorithm is constructed to solve the minimum Frobenius norm residual problem: \(||(\binom{AXB}{CXD}) - (\binom EF)|| = \min\) over a generalized reflexive matrix \(X\). For any initial generalized reflexive matrix \(X_1\), by the iterative algorithm, the generalized reflexive solution \(X^\ast\) can be obtained within finite iterative steps in the absence of round-off errors, and the unique least-norm generalized reflexive solution \(X^\ast\) can also be derived when an appropriate initial iterative matrix is chosen. Furthermore, the unique optimal approximate solution \(\hat X\) to a given matrix \(X_0\) in Frobenius norm can be derived by finding the least-norm generalized reflexive solution \(\widetilde X^\ast\) of a new corresponding minimum Frobenius norm residual problem: \(\min || (\binom{A\widetilde{X}B}{C\widetilde{X}D}) - (\binom{\widetilde{E}}{\widetilde{F}})\) with \(\widetilde{E} = E - AX_0B, \widetilde{F} = F - CX_0D\). Finally, several numerical examples are given to illustrate that our iterative algorithm is effective. Cited in 2 Documents MSC: 65F30 Other matrix algorithms (MSC2010) 65F10 Iterative numerical methods for linear systems 15A24 Matrix equations and identities Keywords:Sylvester systems; iterative method; algorithm; minimum Frobenius norm residual problem; generalized reflexive matrix; least-norm generalized reflexive solution; numerical examples PDF BibTeX XML Cite \textit{F. Yin} and \textit{G.-X. Huang}, Abstr. Appl. Anal. 2012, Article ID 857284, 18 p. (2012; Zbl 1242.65085) Full Text: DOI References: [1] F. Li, X. Hu, and L. Zhang, “The generalized reflexive solution for a class of matrix equations AX=B; XC=D,” Acta Mathematica Scientia Series B, vol. 28, no. 1, pp. 185-193, 2008. · Zbl 1150.15006 [2] J.-C. Zhang, X.-Y. Hu, and L. Zhang, “The (P,Q) generalized reflexive and anti-reflexive solutions of the matrix equation AX=B,” Applied Mathematics and Computation, vol. 209, no. 2, pp. 254-258, 2009. · Zbl 1168.15008 [3] B. Zhou, Z.-Y. Li, G.-R. Duan, and Y. 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