Let p<sub>n</sub>(z)=∑<sub>k-0</sub><sup>n</sup> a<sub>k</sub>z<sup>k</sup> be a polynomial of degree n such that |p<sub>n</sub>(z)|≤M for |z|≤1. It is well.know
In this paper best approximation by reciprocals of functions of a subspace U<sub>n</sub>=span(u<sub>1</sub>,…,u<sub>n</sub>)satisfying coefficient constraints is
Here proposed are certain asymptotic expansion formulas for Ln(w-1)(λz) and Cn(ω)(λz) in whichO(λ) and n = 0(λ1/2 )(λ→∞) , z being x complex number. Als