“…Cho et al [8] have introduced 2 : for each ∈ , for each > 0, there corresponds a positive number = ( , ) such that if is a point of such that ( , ) ≥ and is any point of then ( , ) + ( , ) ≥ , 3 : for each positive number there is a positive number = ( ) such that ( , ) + ( , ) ≥ for all in and all , in with ( , ) ≥ . Proof.…”