Classification of positive solutions to a system of Hardy-Sobolev type equations

In this paper, we are concerned with the following Hardy-Sobolev type system (0.1){(-Δ)α2u(x)=υq(x)|y|t2(-Δ)α2υ(x)=up(x)|y|t1,x=(y,z)∈(ℝk\{0})×ℝn-k,where 0<αn-α,1