Abstract
Some properties of strongly convex functions are presented. A characterization of pairs of functions that can be separated by a strongly convex function and a Hyers–Ulam stability result for strongly convex functions are given. An integral Jensen-type inequality and a Hermite–Hadamard-type inequality for strongly convex functions are obtained. Finally, a relationship between strong convexity and generalized convexity in the sense of Beckenbach is shown.
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References
Baron K., Matkowski J., Nikodem K.: A sandwich with convexity. Math. Pannonica 5/1, 139–144 (1994)
Beckenbach E.F.: Generalized convex functions. Bull. Am. Math. Soc. 43, 363–371 (1937)
Bessenyei M., Páles Zs.: Hadamard-type inequalities for generalized convex functions. Math. Inequal. Appl. 6/3, 379–392 (2003)
Bessenyei M., Páles Zs.: Characterization of convexity via Hadamard’s inequality. Math. Inequal. Appl. 9/1, 53–62 (2006)
Dragomir, S.S., Pearce, C.E.M.: Selected Topics on Hermite–Hadamard Inequalities and Applications, RGMIA Monographs, Victoria University (2002) (http://rgmia.vu.edu.au/monographs/)
Hiriart-Urruty J.-B., Lemaréchal C.: Fundamentals of Convex Analysis. Springer, Berlin (2001)
Hyers D.H., Ulam S.M.: Approximately convex functions. Proc. Am. Math. Soc. 3, 821–828 (1952)
Kuczma, M.: An Introduction to the Theory of Functional Equations and Inequalities. Cauchy’s Equation and Jensen’s Inequality, 2nd edn. PWN, Uniwersytet Śla̧ski, Warszawa, Kraków, Katowice, 1985. Birkhäuser, Basel (2009)
Niculescu, C.P., Persson, L.-E.: Convex Functions and their Applications. A Contemporary Approach, CMS Books in Mathematics, vol. 23. Springer, New York (2006)
Nikodem K., Páles Zs.: Generalized convexity and separation theorems. J. Conv. Anal. 14/2, 239–247 (2007)
Polyak B.T.: Existence theorems and convergence of minimizing sequences in extremum problems with restrictions. Soviet Math. Dokl. 7, 72–75 (1966)
Roberts A.W., Varberg D.E.: Convex Functions. Academic Press, New York (1973)
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Dedicated to Professor János Aczél on his 85th birthday
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Merentes, N., Nikodem, K. Remarks on strongly convex functions. Aequat. Math. 80, 193–199 (2010). https://doi.org/10.1007/s00010-010-0043-0
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DOI: https://doi.org/10.1007/s00010-010-0043-0