Let (X, Σ, μ) be a finite measure space, Lp = Lp(X, Σ, μ) be the space of all pth power positive integrable functions over (X, Σ, μ), p > 1, 1 p + 1 q = 1, then for f, g ε{lunate} Lp the Hölder inequality ∥ fg ∥1 ≤ ∥ f ∥p ∥ g ∥q holds, where ∥ f ∥p = (∝Xfp dμ) 1 p. In this paper, we discuss its inverses. © 1991.