We establish necessary and sufficient conditions for the existence of triangular solutions of a linear matrix equation AX + YB = Cover the commutative ring of principal ideals whose matrix coefficients A, B , and C are triangular matrices. It is also shown that there is no matrix equation of this kind all solutions of which are triangular.
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Translated from Matematychni Metody ta Fizyko-Mekhanichni Polya, Vol. 62, No. 2, pp. 26–31, April–June, 2019.
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Dzhaliuk, N.S. Solutions of the Matrix Equation AX + YB = C with Triangular Coefficients. J Math Sci 261, 25–32 (2022). https://doi.org/10.1007/s10958-022-05734-x
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DOI: https://doi.org/10.1007/s10958-022-05734-x