### Almost convex functions

Marek Kuczma (1970)

Colloquium Mathematicae

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Marek Kuczma (1970)

Colloquium Mathematicae

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J. D. Monk

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Mirosław Adamek (2003)

Mathematica Slovaca

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Komiya, Hidetoshi, Park, Sehie (2007)

Fixed Point Theory and Applications [electronic only]

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Marek Lassak (1984)

Fundamenta Mathematicae

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Roman Ger (1988)

Mathematica Slovaca

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Witold Jarczyk (2013)

Banach Center Publications

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We give a review of results proved and published mostly in recent years, concerning real-valued convex functions as well as almost convex functions defined on a (not necessarily convex) subset of a group. Analogues of such classical results as the theorems of Jensen, Bernstein-Doetsch, Blumberg-Sierpiński, Ostrowski, and Mehdi are presented. A version of the Hahn-Banach theorem with a convex control function is proved, too. We also study some questions specific for the group setting,...

Hadžić, Olga (1998)

Novi Sad Journal of Mathematics

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Mitrović, Zoran D. (2006)

Fixed Point Theory and Applications [electronic only]

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Kolman, Oren (2000)

ELA. The Electronic Journal of Linear Algebra [electronic only]

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Chang, Tong-Huei, Chen, Chi-Ming, Huang, Yueh-Hung (2009)

Fixed Point Theory and Applications [electronic only]

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Carbone, A. (1992)

International Journal of Mathematics and Mathematical Sciences

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