Direct estimate for positive linear operators in polynomial weighted spaces

作者：Bustamante Jorge; Quesada Jose M^*; Morales de la Cruz Lorena

来源：Journal of Approximation Theory, 2010, 162(8): 1495-1508.

DOI：10.1016/j.jat.2010.04.001

• Positive linear operators
• Weighted approximation
• Direct a theorems
• Baskakov-type operators
• Szasz-Mirakyan-type operators

We present direct theorems for some sequences of positive linear operators in weighted spaces. The results, given in terms of some Ditzian-Totik moduli of smoothness, include estimations in norms and Becker type estimations.

• 出版日期2010-8