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浙江大学学报(理学版)  2021, Vol. 48 Issue (2): 189-195    DOI: 10.3785/j.issn.1008-9497.2021.02.008
数学与计算机科学     
修正Bernstein算子加Jacobi权的Voronovskaja型估计
夏荣荣, 虞旦盛
杭州师范大学 数学系,浙江 杭州 310036
Estimations of Voronovskaja type weighted by Jacobi with a modified Bernstein operators
XIA Rongrong, YU Dansheng
Department of Mathematics, Hangzhou Normal University, Hangzhou 310036, China
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摘要: 研究了修正Bernstein算子对奇性函数的加权逼近性质,得到其逼近定理,建立了修正Bernstein算子加Jacobi权的Voronovskaja型估计,值得注意的是,Jacobi权函数中的参数ab无上界限制。
关键词: 加权逼近Jacobi权Voronovskaja型估计Bernstein算子    
Abstract: The weighted approximation for the functions with singularities by a type of modified Bernstein operators was studied.The direct theorem and the estimation of Voronovskaja type with Jocobi weights were obtained. It should be noted that the parameters a and b in the Jacobi weight functions have no restrictions on the upper bounds.
Key words: Jacobi weights    Bernstein operators    weighted approximation    Vononovskaja type estimates
收稿日期: 2018-10-11 出版日期: 2021-03-18
CLC:  O  
通讯作者: ORCID:http://orcid.org/0000-0003-3378-3251,E-mail:dsyu@hznu.edu.cn     E-mail: dsyu@hznu.edu.cn
作者简介: 夏荣荣(1992—),ORCID:http://orcid.org/0000-0001-8835-6068,女,硕士,主要从事函数逼近论研;
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夏荣荣, 虞旦盛. 修正Bernstein算子加Jacobi权的Voronovskaja型估计[J]. 浙江大学学报(理学版), 2021, 48(2): 189-195.

XIA Rongrong, YU Dansheng. Estimations of Voronovskaja type weighted by Jacobi with a modified Bernstein operators. Journal of Zhejiang University (Science Edition), 2021, 48(2): 189-195.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2021.02.008        https://www.zjujournals.com/sci/CN/Y2021/V48/I2/189

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