Kominek, Z.; Kuczma, M. \(p\)-convex functions in linear spaces. (English) Zbl 0778.46013 Ann. Pol. Math. 53, No. 2, 91-108 (1991). Reviewer: A.G.Kusraev (Novosibirsk) MSC: 46A55 46A40 52A41 PDF BibTeX XML Cite \textit{Z. Kominek} and \textit{M. Kuczma}, Ann. Pol. Math. 53, No. 2, 91--108 (1991; Zbl 0778.46013) Full Text: DOI
Kominek, Zygfryd Some theorems on differentiable solutions of a system of functional equations of \(n\)-th order. (English) Zbl 0434.39005 Ann. Pol. Math. 37, 71-91 (1980). MSC: 39B62 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Pol. Math. 37, 71--91 (1980; Zbl 0434.39005) Full Text: DOI
Kominek, Z. C\(^r\)-solutions of a system of functional equations. (English) Zbl 0291.39008 Ann. Pol. Math. 30, 191-203 (1974). MSC: 39B99 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Pol. Math. 30, 191--203 (1974; Zbl 0291.39008) Full Text: DOI
Kominek, Z.; Matkowski, J. On the existence of a convex solution of the functional equation \(\varphi (x)=h(x,\varphi [f(x)]\)). (English) Zbl 0284.39009 Ann. Pol. Math. 30, 1-4 (1974). MSC: 39B05 PDF BibTeX XML Cite \textit{Z. Kominek} and \textit{J. Matkowski}, Ann. Pol. Math. 30, 1--4 (1974; Zbl 0284.39009) Full Text: DOI