On the Approximation in the Weighted Spaces ( ) via Spline Polynomials

Abstract

In this paper, we introduce a new norm and modulus in weighted spaces ) , ( )) of order .Via these modulus, we prove the direct and inverse spline approximation inequalities of unbounded functions in weighted spaces ) , ( ) ( ; 0 < ≤ 1 which is the main results of our paper. Keyword