Simultaneous Approximation by Polynomial
β
T. F. Xie; S. P. Zhou
π
Article
π
2009
π
John Wiley and Sons
π
English
β 490 KB
Pointwise estimates are obtained for simultaneous approximation of a function f and its derivatives by means of an arbitrary sequence of bounded projection operators with some extra condition (1.3) (we do not require the operators to be linear) which map C I -~, ~~ into polynomials of degree n, augm