and so the function � does not satisfy the conclusionof Lemma 1 provided that there is no � ∈ (0, 1). On the basisof Lemma 1, one can easily revisit the results reported in [26–28].
and so the function � does not satisfy the conclusion<br>of Lemma 1 provided that there is no � ∈ (0, 1). On the basis<br>of Lemma 1, one can easily revisit the results reported in [26–<br>28].