We consider the linear combinations of Baskakov-Durrmeyer operators and give the characterization interms of the classical modulous of smoothness for ∞-norm by
Let G be a Polya frequency density and G its periodization.We get the exact value of upper approxi-mation of S<sub>1</sub>(G),which is a convolution class with ke
The present note investigates the divergence phenomenon of copositive approximation by poiynomials inL’spaces. We show that the Jackson type estimates cannot h