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39B72 Systems of functional equations and inequalities (11 articles)

• Saadati, Reza; Sadeghi, Ghadir: Nonlinear stability of a quadratic functional equation with complex involution. (English). Archivum Mathematicum, vol. 47 (2011), issue 2, pp. 111-117
• Neuman, František: Coordinate description of analytic relations. (English). Mathematica Bohemica, vol. 131 (2006), issue 2, pp. 197-210
• Zgraja, Tomasz: On continuous convex or concave functions with respect to the logarithmic mean. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 46 (2005), issue 1, pp. 3-10
• Ciepliński, Krzysztof: The structure of disjoint iteration groups on the circle. (English). Czechoslovak Mathematical Journal, vol. 54 (2004), issue 1, pp. 131-153
• Sadowska, Elżbieta: Almost midconvex and almost convex set-valued functions. (English). Mathematica Slovaca, vol. 50 (2000), issue 4, pp. 453-461
• Nowakowska, W.; Werbowski, J.: Oscillation of linear functional equations of higher order. (English). Archivum Mathematicum, vol. 31 (1995), issue 4, pp. 251-258
• Nikodem, Kazimierz: On $\varepsilon$-invariant measures and a functional equation. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 4, pp. 565-569
• Alsina, Claudi; García Roig, Jaime L.: On some inequalities characterizing the exponential function. (English). Archivum Mathematicum, vol. 26 (1990), issue 2, pp. 67-71
• Nikodem, Kazimierz: A characterization of midconvex set-valued functions. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 30 (1989), issue 2, pp. 125-129
• Ger, Roman: Almost approximately convex functions. (English). Mathematica Slovaca, vol. 38 (1988), issue 1, pp. 61-78
• Ger, Roman: Errata for the paper: ``Almost approximately convex functions'. (English). Mathematica Slovaca, vol. 38 (1988), issue 4, pp. 423