Rate of pointwise convergence of a new kind of gamma operators for functions of bounded variation

被引:15
作者
Karsli, Harun [1 ]
Gupta, Vijay [2 ]
Izgi, Aydin [3 ]
机构
[1] Abant Izzet Baysal Univ, Fac Sci & Arts, Dept Math, TR-14280 Golkoy Bolu, Turkey
[2] Netaji Subhas Inst Technol, Sch Appl Sci, New Delhi 110075, India
[3] Harran Univ, Sci & Arts Fac, Dept Math, Sanliurfa, Turkey
关键词
Rate of convergence; Approximation; Lebesgue point; Gamma operators; Bounded variation; INTEGRAL TYPE OPERATORS;
D O I
10.1016/j.aml.2006.12.015
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
In the present paper we investigate the behavior of the operators L-n(f, x), defined as Ln(f : x) = (2n +3)!x(n+3)/n!(n+2)! integral(infinity)(0) t(n)/(x + t)(2n+4)f(t)dt, x > 0, and give an estimate of the rate of pointwise convergence of these operators on a Lebesgue point of bounded variation function f defined on the interval (0, infinity). We use analysis instead of probability methods to obtain the rate of pointwise convergence. This type of study is different from the earlier studies on such a type of operator. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:505 / 510
页数:6
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