奥尔里奇空间中Bernstein-Durrmeyer多项式逼近的正逆定理

THE DIRECT AND CONVERSE THEOREMS OF APPROXIMATION FOR BERNSTEIN DURRMEYER POLYNOMIALS IN ORLICZ SPACES

研究Ｏｒｌｉｃｚ空间中Ｂｅｒｎｓｔｅｉｎ－Ｄｕｒｒｍｅｙｅｒ多项式的逼近，得到强型正定理和弱型逆定理．

The approximation by the Bernstein Durrmeyer operators in Orlicz spaces are studied, and the direct theorem of strong type and converse theorem of weak type are obtained.