Geodesic
Some classes of linear conjugation problems for a four-dimensional vector that are solvable in closed form
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (2019), pp. 23-33.

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We consider the structure of the set of piecewise meromorphic solutions for a homogeneous linear conjugation problem for a four-dimensional vector. We show that in the presence of three piecewise meromorphic solutions to the linear conjugation problem it is possible to construct a canonical system of solutions to the linear conjugation problem and distinguish some classes of problems that are solvable in closed form.
Keywords: matrix-function, linear conjugation problem, factorization. 
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S. N. Kiyasov. Some classes of linear conjugation problems for a four-dimensional vector that are solvable in closed form. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (2019), pp. 23-33. http://geodesic.mathdoc.fr/item/IVM_2019_6_a2/

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