Markov and Bernstein type inequalities for polynomials.
Govil, N.K., Mohapatra, R.N. (1999)
Journal of Inequalities and Applications [electronic only]
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Govil, N.K., Mohapatra, R.N. (1999)
Journal of Inequalities and Applications [electronic only]
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Abstract and Applied Analysis
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Kim, T., Choi, J., Kim, Y.H. (2010)
Abstract and Applied Analysis
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Abstract and Applied Analysis
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Marek Beśka (1989)
Banach Center Publications
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Abstract and Applied Analysis
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Kim, Taekyun, Jang, Lee-Chae, Yi, Heungsu (2010)
Discrete Dynamics in Nature and Society
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Jung, H.S., Kwon, K.H., Lee, D.W. (1997)
Journal of Inequalities and Applications [electronic only]
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Rababah, A., Alqudah, M. (2005)
Journal of Applied Mathematics
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Gal, Sorin G., Tachev, Gancho T. (2013)
Mathematica Balkanica New Series
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MSC 2010: 41A10, 41A15, 41A25, 41A36 For functions belonging to the classes C2[0; 1] and C3[0; 1], we establish the lower estimate with an explicit constant in approximation by Bernstein polynomials in terms of the second order Ditzian-Totik modulus of smoothness. Several applications to some concrete examples of functions are presented.
M. A. Qazi (2013)
Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica
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We point out certain flaws in two papers published in Ann. Univ. Mariae Curie-Skłodowska Sect. A, one in 2009 and the other in 2011. We discuss in detail the validity of the results in the two papers in question.
Stephan Ruscheweyh, Magdalena Wołoszkiewicz (2011)
Annales UMCS, Mathematica
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Let || · || be the uniform norm in the unit disk. We study the quantities Mn (α) := inf (||zP(z) + α|| - α) where the infimum is taken over all polynomials P of degree n - 1 with ||P(z)|| = 1 and α > 0. In a recent paper by Fournier, Letac and Ruscheweyh (Math. Nachrichten 283 (2010), 193-199) it was shown that infα>0Mn (α) = 1/n. We find the exact values of Mn (α) and determine corresponding extremal polynomials. The method applied uses known cases of maximal ranges of polynomials. ...