Ground state solutions of fractional Choquard equations with general potentials and nonlinearities

In the present paper, we consider the following fractional Choquard equation with general potentials and nonlinearities of the form (-Delta)(s)(u) + V(x)u = (I-alpha * F(u))f (u), in R-N, where s is an element of (0, 1), N > 2s, (-Delta)(s) is the fractional Laplacian, alpha is an element of (0, N), potential V is an element of C-1(R-N, [0, infinity)), I-alpha is a Riesz potential, the nonlinearity F satisfies the general Berestycki-Lions-type assumptions. By introducing some new techniques, we establish the existence of ground state solution of Pohozaev-type to the above equation by variational methods.