Vanishing solutions of a second-order discrete non-linear equation of Emden-Fowler type

Abstract

The paper discusses a discrete equation of an Emden-Fowler type Δ2v(k) = -k3 (Δv(k))3 where v is a dependent variable, k is an integer-valued independent variable, Δv and Δ2v are the first and second-order forward differences of v, respectively. The paper aims to prove the existence of a nontrivial and vanishing solution for k ! 1. The equation is transformed into a system of two first-order difference equations, which makes it possible to apply previously known results when investigating the system.