A Pohozaev Identity for the Fractional H$\acute{e}$non System
  In this paper, we study the Pohozaev identity associated with a H$\acute{e}$non-Lane-Emden system involving the fractional Laplacian:   \begin{equation}   \left\{\begin{array}{ll}   (-\triangle)^su=|x|^av^p,&x\in\Omega,   (-\triangle)^sv=|x|^bu^q,&x\in\Omega, u=v=0,&x\in R^n\backslash\Omega,   \end{array}   \right.   \end{equation} in a star-shaped and bounded domain $\Omega$ for $s\in(0,1)$. As an application of our identity, we deduce the nonexistence of positive solutions in the critical and supercritical cases. 
Pei Ma and Fengquan Li and Yan Li
math.AP