AU - Rabago, J. F.
TI - On the Closed-Form Solution of a Nonlinear Difference Equation and Another Proof to Sroysangâ€™s Conjecture
PT - JOURNAL ARTICLE
TA - IJMSI
JN - IJMSI
VO - 13
VI - 1
IP - 1
4099 - http://ijmsi.ir/article-1-775-en.html
4100 - http://ijmsi.ir/article-1-775-en.pdf
SO - IJMSI 1
ABÂ - The purpose of this paper is twofold. First we derive theoretically, using appropriate transformation on x(n), the closed-form solution of the nonlinear difference equation x(n+1) = 1/(±1 + x(n)), n ∈ N_0. The form of solution of this equation, however, was first obtained in [10] but through induction principle. Then, with the solution of the above equation at hand, we prove a case of Sroysang’s conjecture (2013) [9] i.e., given a fixed positive integer k, we verify the validity of the following claim: lim x→∞ f(x + k)/f(x) = φ, where φ = (1 + √5)/2 denotes the well-known golden ratio and the real valued function f on R satisfies the functional equation f(x + 2k) =f(x + k) + f(x) for every x ∈ R. We complete the proof of the conjecture by giving out an entirely different approach for the other case.
CP - IRAN
IN - Department of Mathematics and Computer Science, College of Science, University of the Philippines Baguio, Governor Pack Road, Baguio City 2600 Benguet, Philippines.
LG - eng
PB - IJMSI
PG - 139
PT - Research paper
YR - 2018