We are dealing with the problem
−Δu(x) = λh(x)u(x) + g(x)up(x) for x ∈ RN,
u ∈ D1,2(RN), u 0,
where λ is a real parameter,N >2, h and g are a changing sign functions, and 1
Keywords :
Indefinite semi-linear elliptic problem , Bifurcation , method , Kelvin transform