On the Lucas sequence equations Vₙ = kVₘ and Uₙ = kUₘ

• Autorzy: Refik Keskin , Zafer Şiar
• Języki publikacji: EN

Abstrakty

EN

Let P and Q be nonzero integers. The sequences of generalized Fibonacci and Lucas numbers are defined by U₀ = 0, U₁ = 1 and $U_{n+1} = PUₙ - QU_{n-1}$ for n ≥ 1, and V₀ = 2, V₁ = P and $V_{n+1} = PVₙ - QV_{n-1}$ for n ≥ 1, respectively. In this paper, we assume that P ≥ 1, Q is odd, (P,Q) = 1, Vₘ ≠ 1, and $V_{r} ≠ 1$. We show that there is no integer x such that $Vₙ = V_{r}Vₘx²$ when m ≥ 1 and r is an even integer. Also we completely solve the equation $Vₙ = VₘV_{r}x²$ for m ≥ 1 and r ≥ 1 when Q ≡ 7 (mod 8) and x is an even integer. Then we show that when P ≡ 3 (mod 4) and Q ≡ 1 (mod 4), the equation $Vₙ = VₘV_{r}x²$ has no solutions for m ≥ 1 and r ≥ 1. Moreover, we show that when P > 1 and Q = ±1, there is no generalized Lucas number Vₙ such that $Vₙ = VₘV_{r}$ for m > 1 and r > 1. Lastly, we show that there is no generalized Fibonacci number Uₙ such that $Uₙ = UₘU_{r}$ for Q = ±1 and 1 < r < m.

Kategorie tematyczne

• 11B37: Recurrences
• 11B39: Fibonacci and Lucas numbers and polynomials and generalizations

• Wydawca: Institute of Mathematics Polish Academy of Sciences
• Czasopismo: Colloquium Mathematicum
• Rocznik: 2013
• Tom: 130
• Numer: 1
• Strony: 27-38

Daty

wydano

2013

Twórcy

autor

Refik Keskin

• Department of Mathematics, Sakarya University, TR54187 Sakarya, Turkey

autor

Zafer Şiar

• Department of Mathematics, Bilecik Şeyh Edebali University, TR11030 Bilecik, Turkey

Identyfikatory

DOI

10.4064/cm130-1-3