Sign-changing solutions for modified Schrödinger–Poisson system with general nonlinearity

This paper is concerned with the existence and multiplicity of sign-changing solutions for the following modified Schrodinger–Poisson system: −Δu+V(x)u+κϕu−12u△u2=f(u),x∈R3,−△ϕ=u2,x∈R3, where κ∈(0,...