【摘要】 讨论了光滑模与K-泛函的关系,给出Baskakov-Durrmeyer算子线性组合加权逼近Stechkin-Marchaud型不等式.同时,得到其逼近的逆定理.更多还原

【Abstract】 This paper studies the equivalence relation between K-functional and molduli of smoothness,and gives the weighted Stechkin-Marchaud-type inequalities of approximation for linear combination of Baskakov-Durrmeyer operators.Moreover,this paper also obtains the inverse result of weighted approximation for linear combination of Baskakov-Durrmeyer operators with ω? 2 r(f;t) w,p.更多还原