On a Sequence of Linear Trigonometric Polynomial Operators

10.4153/CJM-1953-063-7

Freud Géza, 1959, Atti Accad. Naz. Lincei. Rend. Cl. Sci. Fis. Mat. Nat. (8), 26, 641

Freud G., 1967, Studia Sci. Math. Hungar., 2, 63

Korovkin P. P., 1960, Linear operators and approximation theory

Natanson I. P., 1964, Constructive function theory. Vol. I. Uniform approximation

Shapiro Harold S., 1969, Smoothing and approximation of functions

Sunouchi G. I., 1964, On Approximation Theory, 5, 183

Titchmarsh E. C., 1961, The Theory of Functions