A closed formula for the Čebyšev barycentric weights of optimal approximation in \(H^ 2\)
A closed barycentric formula for the optimal interpolant in \(H^ 2\) corresponding to the Chebyshev points of the first kind is given. Moreover, only \(O(n)\) operations are necessary for computing all corresponding weights. At last some numerical examples are illustrated for the comparison with other approximation formulas.
scientific article; zbMATH DE number 510196