Ground state solutions of Pohozaev type for fractional Choquard equations with general nonlinearities

In this paper, we study the fractional Choquard equation (-Delta)(s)u + u = (vertical bar x vertical bar(-mu)*F(u))f(u), in R-N, where N >= 3, 0 < s < 1, 0 < mu < min{N, 4s), and f is an element of C(R, R) satisfies the general Berestycki-Lions conditions. Combining constrained variational method with deformation lemma, we obtain a ground state solution of Pohozaev type for the above equation. The result improves some ones in Shen et al. (2016). (C) 2018 Published by Elsevier Ltd.