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Abstrakty
Assume V is a real vector space. We consider the functional inequality f(x+y)-f(x)-f(y) is more than or equal to Phi(x,y) (x,y is an element of V) for f : V --> R and Phi : V x V --> R such that Phi(x, .) is homogeneous for every x is an element of V and we provide conditions on f which force the representation f(x)=L(x)+B(x,x) (x is an element of V) with a linear L : V --> R and a bilinear and symmetric B : V x V --> R.
Wydawca
Rocznik
Tom
Strony
301--307
Opis fizyczny
Bibliogr. 3 poz.
Twórcy
autor
- Institute of Mathematics, Silesian University, Bankowa 14, 40-007 Katowice, Poland
autor
- Institute of Mathematics, Silesian University, Bankowa 14, 40-007 Katowice, Poland
Bibliografia
- [1] B. Choczewski, R. Girgensohn, Z. Kominek, Solution of Rolewicz’s problem, http://www.siam.org/journals/problems/01-005.htm.
- [2] M. Kuczma, An introduction to the theory of functional equations and inequalities. Cauchy’s equation and Jensen’s inequality, Pr. Nauk. Uniw. Śl. Katow., nr 489, PWN i Uniw. Śl., Warszawa Kraków Katowice 1985.
- [3] S. Rolewicz, Φ-convex functions defined on metric spaces, Int. J. Math. Sci. (Kluwer/Plenum), to be published.
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Bibliografia
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bwmeta1.element.baztech-article-BAT5-0001-0071