$L^p$函数的分布函数在端点处的极限性质

We consider the limiting property of the distribution function of L~p function at endpoints 0 and ∞ and prove that for λ 0 the following two equations limλ→+∞λ~pm({x : |f(x)| λ}) = 0, limλ→0+λ~pm({x : |f(x)| λ}) = 0hold for f ∈ L~p(Rn) with 1 ≤ p ∞. This result is naturally applied to many operators of type(p, q) as well.