Authors: Stević, Stevo 
Title: Solvable product-type system of difference equations whose associated polynomial is of the fourth order
Journal: Electronic Journal of Qualitative Theory of Differential Equations
Volume: 2017
Issue Date: 1-Jan-2017
Rank: M21
ISSN: 1417-3875
DOI: 10.14232/ejqtde.2017.1.13
Abstract: 
The solvability problem for the following system of difference equations zn+1 = αznwan,b wn+1 = βwn−1c zdn−2, n ∈ N0, where a, b, c, d ∈ Z, α, β ∈ C \ {0}, z−2, z−1, z0, w−1, w0 ∈ C \ {0}, is solved. In the main case when bd ̸= 0, a polynomial of the fourth order is associated to the system, and its solutions are represented in terms of the parameters, through the roots of the polynomial in all possible cases (the roots are given in terms of parameters a, b, c, d). This is also the first paper which successfully deals with the associated polynomial (to a product-type system) of the fourth order in detail, which is the main achievement of the paper.
Keywords: Polynomial of fourth order | Product-type system | Solvable in closed form | System of difference equations
Publisher: Bolyai Institute, University of Szeged

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