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一类修正的和与积分混合型算子的L_p逼近(英文) 被引量:2

Approximation by Modified Summation Integral Type Operators in the L_p Spaces
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摘要 The generalized summation integral type operators with Beta basis functions are widely studied. At present, the investigations for the properties of these operators are only limited to the functions of bounded variation. Some authors studied the rate of point-wise rate of convergence, asymptotic formula of Voronovskaja type, and some direct results about these type of operators. The present paper considers the direct, inverse and equivalence theorems of modified summation integral type operators in the Lp spaces. The generalized summation integral type operators with Beta basis functions are widely studied. At present, the investigations for the properties of these operators are only limited to the functions of bounded variation. Some authors studied the rate of point-wise rate of convergence, asymptotic formula of Voronovskaja type, and some direct results about these type of operators. The present paper considers the direct, inverse and equivalence theorems of modified summation integral type operators in the Lp spaces.
出处 《Journal of Mathematical Research and Exposition》 CSCD 2009年第6期1069-1081,共13页 数学研究与评论(英文版)
基金 the National Natural Science Foundation of China (No.10571040)
关键词 Lp空间 求和函数 积分型 算子逼近 改性 运营商 有界变差 渐近公式 Beta operators K-functional moduli of smoothness Riesz-Thorin interpolationtheorem H61der inequality.
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