[1]College of Mathematics and Information Science, Hebei Normal University, Sho'iazhuang 050024, P.R. China.;
[2]Hebei Key Laboratory of Computational Mathematics and Applications, Shijiazhuang, 050024, P.R. China.;
Kantorovich算子 误差估计 勒贝格函数 逼近算子 目标函数 逼近理论 测试功能 ya型;