Kominek, Zygfryd; Troczka, Katarzyna Some remarks on subquadratic functions. (English) Zbl 1127.39048 Demonstr. Math. 39, No. 4, 751-758 (2006). Reviewer: Sanford L. Segal (Rochester) MSC: 39B22 26A51 PDF BibTeX XML Cite \textit{Z. Kominek} and \textit{K. Troczka}, Demonstr. Math. 39, No. 4, 751--758 (2006; Zbl 1127.39048) Full Text: DOI
Kominek, Zygfryd On Hyers-Ulam stability of the Pexider equation. (English) Zbl 1067.39041 Demonstr. Math. 37, No. 2, 373-376 (2004). Reviewer: Szymon Wąsowicz (Bielsko-Biała) MSC: 39B82 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Demonstr. Math. 37, No. 2, 373--376 (2004; Zbl 1067.39041) Full Text: DOI
Kominek, Zygfryd On approximately subadditive functions. (English) Zbl 0726.39005 Demonstr. Math. 23, No. 1, 155-160 (1990). Reviewer: S.L.Segal (Rochester) MSC: 39B72 26A51 PDF BibTeX XML Cite \textit{Z. Kominek}, Demonstr. Math. 23, No. 1, 155--160 (1990; Zbl 0726.39005) Full Text: DOI
Kominek, Zygfryd On a local stability of the Jensen functional equation. (English) Zbl 0702.39007 Demonstr. Math. 22, No. 2, 499-507 (1989). Reviewer: C.T.Ng MSC: 39B72 39B52 26B25 PDF BibTeX XML Cite \textit{Z. Kominek}, Demonstr. Math. 22, No. 2, 499--507 (1989; Zbl 0702.39007) Full Text: DOI
Kominek, Zygfryd On the functional equation phi(x)=h(x,phi[f(x)]). (English) Zbl 0507.39004 Demonstr. Math. 14, 1031-1045 (1981). MSC: 39B62 PDF BibTeX XML Cite \textit{Z. Kominek}, Demonstr. Math. 14, 1031--1045 (1981; Zbl 0507.39004) Full Text: DOI