supported by the National Natural Science Foundation of China(11371225);National Natural Science Foundation of Guangdong Province(2016A030313686)
In this article, we consider the non-linear difference equation(f(z + 1)f(z)-1)(f(z)f(z-1)-1) =P(z, f(z))/Q(z, f(z)),where P(z, f(z)) and Q(z, f(z)) are relatively prime polynomials in f(z) with rational coefficients....