Exponentially convex functions generated by Wulbert’s inequality and Stolarsky‐type means

Exponentially convex functions generated by Wulbert’s inequality and Stolarsky‐type means

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Article ID: iaor20122208
Volume: 55
Issue: 7-8
Start Page Number: 1849
End Page Number: 1857
Publication Date: Apr 2012
Journal: Mathematical and Computer Modelling
Authors: , ,
Keywords: optimization
Abstract:

Let − ∞ < a < b < ∞ equ1. If f equ2 is concave on [ a , b ] equ3 and ψ ′ equ4 is convex on the interval of integration, then Wulbert proved that 1 δ + − δ − ∫ δ − δ + ψ ( u ) d u ≥ 1 b − a ∫ a b ψ ( f ( x ) ) d x , equ5 where δ − = f ¯ − 3 ( ‖ f ‖ 2 2 − ( f ¯ ) 2 ) 1 / 2 equ6, δ + = f ¯ + 3 ( ‖ f ‖ 2 2 − ( f ¯ ) 2 ) 1 / 2 equ7, f ¯ = 1 b − a ∫ a b f ( x ) d x equ8 and ‖ f ‖ p = ( 1 b − a ∫ a b | f ( x ) | p d x ) 1 / p equ9. We define new Cauchy type means using a functional defined via above inequality and give some related results as applications.

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