The problem of the best linear methods for approximating functions which are analytic in the unit circle

1. K. I. Babenko, “The best approximation to a class of analytic functions,” Izv. Akad. Nauk SSSR,22, No.5, 631–640 (1958).

   Google Scholar 

2. L. V. Taikov, “The best linear methods of approximating functions of classes B^r and H^r,” Usp. Matem. Nauk,18, No.4 (112) (1963).

3. A. V. Letnikov, “Investigations concerning the theory of integrals of the form\(\int\limits_a^x {(x - u)p - 1f(u)du} \),” Matem. Sb.,7, No. 1, 1–205 (1874).

   Google Scholar 

4. W. E. Sewell, “Generalized derivatives and approximations by polynomials,” Trans. Am. Math. Soc.,41, No. 1, 84–123 (1937).

   Google Scholar 

5. P. Montel, “Sur les polynomes d'approximation,” Bull. Soc. Math. de France,46, 151–196 (1919).

   Google Scholar 

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