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On Chebyshev's inequality for sequences

✍ Scribed by Gh. Toader


Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
227 KB
Volume
161
Category
Article
ISSN
0012-365X

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✦ Synopsis


We give improved versions of Chebyshev's inequality for star-shaped sequencesi Valid • also for convex sequences.


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Denote by \(\eta_{i}=\cos (i \pi / n), i=0, \ldots, n\) the extreme points of the Chebyshev polynomial \(T_{n}(x)=\cos (n \operatorname{arc} \cos x)\). Let \(\pi_{n}\) be the set of real algebraic polynomials of degree not exceeding \(n\), and let \(B_{n}\) be the unit ball in the space \(\pi_{n}\)