“…On the other hand, a large part of the litterature on fractional PDEs with nonlinearities is devoted to proving the nonexistence of trivial solutions when the initial datum φ vanishes outside Bp0, Rq and c 0 pxq " 0 in (3.1), see, e.g., [4], [76], [27]. This also includes the method of moving spheres, see [28], [31], and the use of the Pohoazev identity for the fractional Laplacian, see [67,69].…”