Asymptotic behavior of entire radial solutions of a biharmonic problem with negative exponent

We consider some qualitative properties of entire radial solutions of a semilinear biharmonic equation with negative exponent:equation(0.1)Δ2u=−u−p,u>0,x∈RN, where N≥3N≥3 and p>1p>1. In this paper we study the asymptotic rate of any regular positive radial entire solution uu of (0.1) at which the limit |x|→+∞|x|→+∞ is attained.