【摘要】 研究了Ｂｅｒｎｓｔｅｉｎ－Ｄｕｒｒｍｅｙｅｒ算子的任意阶导数对闭区间￣［０，１］上有界变差函数的逼近，给出了点态收敛阶，并证明了本文所得到的结果是不能改进的。更多还原

【Abstract】 Having studied the approximation of the free order derivatives of Bernstein-Dur-rmeyer operator’s to the functions with bounded variation in the open interval 0 to 1, the degree of pointwise convergence is given and the deduction proves thatthis results cannot be improved further。更多还原