References
- Videnskii , V.S. 1991 . On the approximation by positive linear operators constructed with rational functions.The Theory of Approximation by Rational Functions . Proceedings of the Conference on approximation of functions . 1991 , Makhach-Kala, Russian. pp. 6 – 8 .
- Mencher , A.E. On exact estimations for rational function operators of Videnskii . The Constructive Theory of Functions.Thesis of reports of Conference in honour of 70-Years Professor Videnskii,V.S . pp. 43 – 44 . St.Petersburg State University, , Russian
- Videnskii , V.S. 1985 . “ Linear Operators of Finite Rank ” . In LGPI 68 Leningrad, , Russian
- Videnskii , V.S. 1985 . “ On same new investigations on approximation by positive linear operators. The Theory of Functions, Functional Analysis and their Applications ” . Vol. 43 , 17 – 33 . Kharkov, , Russian English transl in Journ of Sov Math
- Videnskii , V.S. 1988 . “ On ω-widths of classes of positive linear operators. The operators and their Aplications ” . In LGPI 19 – 27 . Leningrad, , Russian
- Videnskii , V.S. 1980 . The negative answer on a certain question of S.N.Bernstein . Dekl.An.Arm.SSR , 70 ( 3 ) : 145 – 150 . in Russian
- Achieser , N.I. 1965 . “ Lectures on Theory of Approximation ” . 407 Moscow, , Russian