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一类修正的Lupas-Durrmeyer型算子的逼近性质研究 被引量:1

Approximation properties of the modified Lupas-Durrmeyer type operators
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摘要 引入了一类修正的Lupas-Durrmeyer型算子,该算子不仅常数保持还线性保持.利用连续模,光滑模和K-泛函,讨论了该算子的某些逼近性质.最后还给出了该算子对Lipschitz函数类的逼近及Voronvskaya型渐近展开公式. In this paper,the authors introduce a class of modified Lupas-Durrmeyer type opera-tors which preserve constant and linear functions.By using modulus of continuity,modulus of smooth,K-functional and lipschitz class,the rate of convergence of these operators are derived.Finally,the authors present a voronovskaya-type asymptotic formula.
作者 连博勇 蔡清波 LIAN Boyong;CAI Qingbo(Dept.of Math.,Yang-En Univ.,Quanzhou 362014,China;School of Math.and Comput.Sci.,Quanzhou Normal Univ.,Quanzhou 362000,China)
出处 《高校应用数学学报(A辑)》 CSCD 北大核心 2018年第1期99-104,共6页 Applied Mathematics A Journal of Chinese Universities(Ser.A)
基金 国家自然科学基金(11601266) 福建省自然科学基金(2016J05017) 2016年福建省高校杰出青年科研人才培育计划
关键词 Lupas-Durrmeyer型算子 K-泛函 连续模 Voronvskaya型渐近展开公式 Lupas-Durrmeyer type operators K-functional modulus of continuity Voronovskaya-type asymptotic formula
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