Authors: Stević, Stevo 
Affiliations: Mathematics 
Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: General solutions to subclasses of a two-dimensional class of systems of difference equations
Journal: Electronic Journal of Qualitative Theory of Differential Equations
Volume: 2021
First page: Art. no. 12
Issue Date: 2021
Rank: ~M21a
ISSN: 1417-3875
DOI: 10.14232/ejqtde.2021.1.12
We show practical solvability of the following two-dimensional systems of difference equations x =u v + a / u + v , y =w s + a / w + s , n ∈ N , where u , v , w and s are x or y , by presenting closed-form formulas for their solutions in terms of parameter a, initial values, and some sequences for which there are closed-form formulas in terms of index n. This shows that a recently introduced class of systems of difference equations, contains a subclass such that one of the delays in the systems is equal to four, and that they all are practically solvable, which is a bit unexpected fact. n+1 n−2 n−3 n−2 n−3 n+1 n−2 n−3 n−2 n−3 0 n n n n n n
Keywords: Practical solvability | Solvable systems | System of difference equations
Publisher: Bolyai Institute, University of Szeged

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