Pointwise Estimates for Finding the Error of Best Approximation by Spline, Positive Algebraic Polynomials and Copositive. Iraqi Journal of Science, [S. l.], v. 63, n. 11, p. 4967–4986, 2022. DOI: 10.24996/ijs.2022.63.11.33. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6802.. Acesso em: 2 may. 2024.