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A novel approach to the Jensen gap through Taylor’s theorem. (English) Zbl 1472.26009

Summary: This article presents a new bound for the Jensen gap in classical as well as in generalized form through an integral identity deduced from Taylor’s theorem. A discussion on the accuracy of the classical bound, through a numerical experiment, is a part of the paper. Also, the proposed bounds generate a bound for the Hermite-Hadamard gap and some reverses of the Hölder inequality. Finally, the paper deals with estimations of the Csiszár divergence and of some of its special cases.

MSC:

26D15 Inequalities for sums, series and integrals
26A51 Convexity of real functions in one variable, generalizations
94A17 Measures of information, entropy
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