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Pointwise Approximation for the Iterated Boolean Sums of Bernstein Operators

Pointwise Approximation for the Iterated Boolean Sums of Bernstein Operators
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摘要 In this paper, with the help of modulus of smoothness ω2r(f,t), we discuss the pointwise approximation properties for the iterated Boolean sums of Bernstein operator B n and obtain direct and inverse theorems when 1-1/r ≤λ≤ 1, r ∈N. In this paper, with the help of modulus of smoothness ωφ^2r(f,t),, we discuss thepointwise approximation properties for the iterated Boolean sums of Bernstein operator B,~ 1and obtain direct and inverse theorems when 1-1/r≤λ≤1,r∈N.
出处 《Chinese Quarterly Journal of Mathematics》 CSCD 2013年第1期129-138,共10页 数学季刊(英文版)
基金 Supported by the NNSF of China(10771049)
关键词 Bernstein operators the iterated Boolean sums modulus of smoothness Bernstein operators the iterated Boolean sums modulus of smoothness
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