Degree of Best Approximation by Trigonometric Blending Functions.
Desigualdades de Gorny-Cartan en espacios normados.
This work deals with the study of the bounds of the asymptotic expansions of complex functions in a normed space. Some inequalities are obtained similar to the Gorny-Cartan for the bounds of asymptotic expansions in an angle of the complex space.
Duffin-Schaeffer type inequalities.