Geodesic
Some factorizations of matrix functions in several variables
Archivum mathematicum, Tome 28 (1992) no. 1-2, pp. 85-94.

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We establish some criteria for a nonsingular square matrix depending on several parameters to be represented in the form of a matrix product of factors which depend on the single parameters.
Classification : 15A23, 15A54, 26B40
Keywords: separation of variables; matrix-valued functions; functional and differential equations for factorizable functions 
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     author = {\v{S}im\v{s}a, Jarom{\'\i}r},
     title = {Some factorizations of matrix functions in several variables},
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     pages = {85--94},
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     zbl = {0784.15006},
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Šimša, Jaromír. Some factorizations of matrix functions in several variables. Archivum mathematicum, Tome 28 (1992) no. 1-2, pp. 85-94. http://geodesic.mathdoc.fr/item/ARM_1992__28_1-2_a11/