本文对Baskakov—Durrmeyer算子证明了其强逆逼近。关于这些不等式Ditzian,Ivanov等用不同的方法得到过,但其结果是λ=1的情况,古典结果λ=0不包括。本文引入K-泛函将已有结论推广到0≤λ≤1的情况.
In this paper, we proved the converse approximation for Baskakov-Durrmeyer operators. On this inequality, Ditzian, Ivanov have chained in different ways, but their result about λ = 1, not include λ =0. The purpose of this paper is to introduce K-functional K(f, t)n to extend the Inequality to 0≤λ≤1.