A Pohozaev Identity for the Fractional H$\acute{e}$non System

Abstract: 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|avp,&x\in\Omega,} (-\triangle)^{sv=|x|buq,&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.