“…The proofs of Theorem 1 are obtained by applying variational arguments inspired by other studies. [22][23][24]33 Theorem 2. Suppose N > sp, s∈(0,1), and 0 < < ∞, then ( , , 1 , 2 , , ) has the minimizers (U (x), min U (x)), ∀ >0, where U (x) are defined as in (15).…”