Supported by the NNSF of China(10371080);Supported by the Educational Committee Foundation of Beijing(01KJ-101)
In this paper, the integral-type Stancu operators on a simplex is considered and its inverse theorem of approximation in Lp(1≤ p 〈+∞)has been obtained.
An inverse theorem for the best weighted polynomial approximation of a function in Lwαp(S) is established. We also investigate Besov spaces generated by Freud weight and their conne...