定理3的证明:对f(x)∈C[0,1],n∈N,x∈[0,1],及0≤β≤γ,定义
对上式右边关于g∈W2取下确界,由定义1可得
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Approximation Properties of a Kind of Stancu Type Operators
REN Meiying
(School of Mathematics and Computer Science,Wuyi University,Wuyishan,Fujian 354300)
In this paper,a kind of Stancu type operators is introduced through the base functions of the Bernstein polynomials.By means of the modulus of continuity,some approximate properties of the operators are studied.A convergence theorem of Korovkin type is established.Some estimations for the rate of convergence of the operators are obtained.
O174.5
A文章标号:1674-2109(2016)12-0063-03
2016-08-10
国家自然科学基金(61572020);福建省自然科学基金(2014J01021)。
任美英(1965-),女,汉族,教授,主要从事函数逼近论的研究。
Key woods:stancu type operators;K-functional;smoothness modulus;approximation properties