Generalization of Jensen's and Jensen-Steffensen's inequalities and their converses by Lidstone's polynomial and majorization theorem

• Published in: Journal of numerical analysis and approximation theory Vol. 46; no. 1
• Main Authors: Gorana Aras-Gazic, Josip Pecaric, Ana Vukelic
• Format: Journal Article
• Language: English
• Published: Publishing House of the Romanian Academy 21.09.2017
• Subjects: (2n)-convex function; Green function; Jensen inequality; Jensen-Steffensen inequality; Lidstone polynomial; majorization
• DOI: 10.33993/jnaat461-1111
• ISSN: 2457-6794

In this paper, using majorization theorems and Lidstone's interpolating polynomials we obtain results concerning Jensen's and Jensen-Steffensen's inequalities and their converses in both the integral and the discrete case. We give bounds for identities related to these inequalities by using Chebyshev functionals. We also give Grüss type inequalities and Ostrowsky type inequalities for these functionals. Also we use these generalizations to construct a linear functionals and we present mean value theorems and n-exponential convexity which leads to exponential convexity and then log-convexity for these functionals. We give some families of functions which enable us to construct a large families of functions that are exponentially convex and also give Stolarsky type means with their monotonicity.