Geodesic
Direct and Converse Theorems for Generalized Bernstein-Type Operators
Serdica Mathematical Journal, Tome 30 (2004) no. 1, pp. 33-42.

Voir la notice de l'article provenant de la source Bulgarian Digital Mathematics Library

We establish direct and converse theorems for generalized parameter dependent Bernstein-type operators. The direct estimate is given using a K-functional and the inverse result is a strong converse inequality of type A, in the terminology of [2].
Keywords: Goodman-Sharma Operator, Direct and Converse Approximation Theorems, K-Functional 
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     title = {Direct and {Converse} {Theorems} for {Generalized} {Bernstein-Type} {Operators}},
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Finta, Zoltán. Direct and Converse Theorems for Generalized Bernstein-Type Operators. Serdica Mathematical Journal, Tome 30 (2004) no. 1, pp. 33-42. http://geodesic.mathdoc.fr/item/SMJ2_2004_30_1_a2/