Hamiltonian-type elliptic systemHamiltonian-type elliptic systemA hamiltonian-type elliptic system is of the form(HS){-Δu=Gv(x;u,v),x∈Ω-Δv=Gu(x;u,v),x∈Ωu=v=0or∂u∂n=∂v∂n=0x∈∂Ωwhere Ω⊂ℝN(N≥1) is an open bounded domain,G(x;u,v)∈𝒞1(Ω¯×ℝ2;ℝ) in the variables (u,v)∈ℝ2 with∇G=(Gu,Gv).