Speed of polynomial approximation entire functions and their properties
  The paper explores connection between the order and the type of an entire function and the speed of the best polynomial approximation in the unit disk. The relations which define the order and the type of an entire function through the sequence of its best approximations, have been found. The results were obtained by generalization previous results of Reddy, I.I. Ibragimov and N. I. Shyhaliev, S. B. Vakarchyk, R. Mamadov. (Rus) 
M. Dveyrin
math.CV