Geodesic
Approximation of Functions of Dirichlet Class by Fej\'er Means
Matematičeskie zametki, Tome 81 (2007) no. 5, pp. 744-750.

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For the Dirichlet classes $\mathscr D_p$ of holomorphic functions in the disk, we obtain the exact orders of best polynomial approximations and of upper bounds for deviations of Fejér means of Taylor series in the Hardy spaces $H_p$.
Keywords: Dirichlet class of holomorphic functions, Fejér mean, best polynomial approximation, Taylor series, Hardy space, Fubini theorem, Riesz theorem. 
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V. V. Savchuk. Approximation of Functions of Dirichlet Class by Fej\'er Means. Matematičeskie zametki, Tome 81 (2007) no. 5, pp. 744-750. http://geodesic.mathdoc.fr/item/MZM_2007_81_5_a11/

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