Kominek, Zygfryd On pexiderized Jensen-Hosszú functional equation on the unit interval. (English) Zbl 1306.39020 J. Math. Anal. Appl. 409, No. 2, 722-728 (2014). MSC: 39B82 PDF BibTeX XML Cite \textit{Z. Kominek}, J. Math. Anal. Appl. 409, No. 2, 722--728 (2014; Zbl 1306.39020) Full Text: DOI
Kominek, Zygfryd Stability aspects of the Jensen-Hosszú equation. (English) Zbl 1328.39044 Filipczak, Małgorzata (ed.) et al., Traditional and present-day topics in real analysis. Dedicated to professor Jan Stanisław Lipiński on the occasion of his 90th birthday. Łódź: Łódź University Press, University of Łódź, Faculty of Mathematics and Computer Science (ISBN 978-83-7525-971-1/pbk). 307-324 (2013). MSC: 39B82 39B22 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, in: Traditional and present-day topics in real analysis. Dedicated to Professor Jan Stanisław Lipiński on the occasion of his 90th birthday. Łódź: Łódź University Press, University of Łódź, Faculty of Mathematics and Computer Science. 307--324 (2013; Zbl 1328.39044)
Kominek, Zygfryd (C-K)-strongly \(n\)-convex functions in linear spaces. (English) Zbl 1292.26068 Commentat. Math. 53, No. 2, 189-196 (2013). MSC: 26D20 PDF BibTeX XML Cite \textit{Z. Kominek}, Commentat. Math. 53, No. 2, 189--196 (2013; Zbl 1292.26068)
Kominek, Zygfryd Fix-point free affine transformations having invariant lines. (English) Zbl 1289.51022 Ann. Univ. Sci. Budap. Rolando Eötvös, Sect. Comput. 41, 37-42 (2013). MSC: 51N20 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Univ. Sci. Budap. Rolando Eötvös, Sect. Comput. 41, 37--42 (2013; Zbl 1289.51022) Full Text: Link
Kominek, Zygfryd On a Drygas inequality. (English) Zbl 1313.39035 Tatra Mt. Math. Publ. 52, 65-70 (2012). Reviewer: Iwona Tyrala (Czȩstochowa) MSC: 39B62 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Tatra Mt. Math. Publ. 52, 65--70 (2012; Zbl 1313.39035) Full Text: DOI
Kominek, Zygfryd On the Hyers-Ulam stability of Pexider-type extension of the Jensen-Hosszu equation. (English) Zbl 1441.39030 Bull. Int. Math. Virtual Inst. 1, 53-57 (2011). MSC: 39B82 39B62 26A51 PDF BibTeX XML Cite \textit{Z. Kominek}, Bull. Int. Math. Virtual Inst. 1, 53--57 (2011; Zbl 1441.39030)
Kominek, Zygfryd On non-measurable subsets of the real line. (English) Zbl 1234.28001 Filipczak, Małgorzata (ed.) et al., Real functions, density topology and related topics. Dedicated to Professor Władysław Wilczyński on the occasion of his 65th birthday. Łódź: Wydawnictwo Uniwersytetu Łódzkiego (ISBN 978-83-7525-536-2/pbk). 65-68 (2011). MSC: 28A05 PDF BibTeX XML Cite \textit{Z. Kominek}, in: Real functions, density topology and related topics. Dedicated to Professor Władysław Wilczyński on the occasion of his 65th birthday. Łódź: Wydawnictwo Uniwersytetu Łódzkiego. 65--68 (2011; Zbl 1234.28001)
Kominek, Zygfryd On a Jensen-Hosszú equation. I. (English) Zbl 1229.39032 Ann. Math. Sil. 23, 57-60 (2009). MSC: 39B22 39B82 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Math. Sil. 23, 57--60 (2009; Zbl 1229.39032)
Kominek, Zygfryd Stability of a quadratic functional equation on semigroups. (English) Zbl 1199.39066 Publ. Math. 75, No. 1-2, 173-178 (2009). MSC: 39B82 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Publ. Math. 75, No. 1--2, 173--178 (2009; Zbl 1199.39066)
Kominek, Zygfryd On pseudoadditive mappings. (English) Zbl 1179.39033 Ann. Math. Sil. 22, 41-44 (2008). MSC: 39B52 39B55 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Math. Sil. 22, 41--44 (2008; Zbl 1179.39033)
Kominek, Zygfryd Remarks on the stability of some quadratic functional equations. (English) Zbl 1168.39011 Opusc. Math. 28, No. 4, 517-527 (2008). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 39B22 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Opusc. Math. 28, No. 4, 517--527 (2008; Zbl 1168.39011)
Kominek, Zygfryd On a problem of Th. Davison. (English) Zbl 1135.39010 Tatra Mt. Math. Publ. 34, No. 2, 229-235 (2006). Reviewer: Miroslav Repický (Košice) MSC: 39B22 PDF BibTeX XML Cite \textit{Z. Kominek}, Tatra Mt. Math. Publ. 34, No. 2, 229--235 (2006; Zbl 1135.39010)
Kominek, Zygfryd A few remarks on almost \(C\)-polynomial functions. (English) Zbl 1150.39328 Math. Slovaca 55, No. 5, 555-561 (2005). MSC: 39B82 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Math. Slovaca 55, No. 5, 555--561 (2005; Zbl 1150.39328) Full Text: EuDML
Kominek, Zygfryd On a functional equation arising in the theory of quasiconformal mappings. (English) Zbl 1079.39020 Aequationes Math. 70, No. 1-2, 37-42 (2005). Reviewer: Borislav Crstici (Timişoara) MSC: 39B22 30C62 PDF BibTeX XML Cite \textit{Z. Kominek}, Aequationes Math. 70, No. 1--2, 37--42 (2005; Zbl 1079.39020) 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 a problem of Wu Wei Chao. (39b.) (English) Zbl 1087.39509 Ann. Math. Sil. 16(2002), 17-20 (2003). MSC: 39B22 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Math. Sil. 16, 17--20 (2003; Zbl 1087.39509)
Kominek, Z. A continuity result in \(t\)-Wright-convex functions. (English) Zbl 1053.26007 Publ. Math. 63, No. 1-2, 213-219 (2003). Reviewer: Gyula Maksa (Debrecen) MSC: 26A51 39B22 26A15 PDF BibTeX XML Cite \textit{Z. Kominek}, Publ. Math. 63, No. 1--2, 213--219 (2003; Zbl 1053.26007)
Kominek, Zygfryd On some properties of the quasisymmetry quotients of functions. (English) Zbl 0931.39012 Aequationes Math. 58, No. 1-2, 93-99 (1999). Reviewer: Johann Aczél (Waterloo/Ontario) MSC: 39B22 PDF BibTeX XML Cite \textit{Z. Kominek}, Aequationes Math. 58, No. 1--2, 93--99 (1999; Zbl 0931.39012) Full Text: DOI
Kominek, Zygfryd Note on selection of Jensen set-valued functions. (English) Zbl 0942.39014 Tatra Mt. Math. Publ. 14, 75-79 (1998). Reviewer: Wilhelmina Smajdor (Katowice) MSC: 39B52 26E25 54C60 PDF BibTeX XML Cite \textit{Z. Kominek}, Tatra Mt. Math. Publ. 14, 75--79 (1998; Zbl 0942.39014)
Kominek, Z. Translations in normed spaces. (English) Zbl 0870.39010 Publ. Math. 49, No. 3-4, 295-299 (1996). Reviewer: Zsolt Páles (Debrecen) MSC: 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Publ. Math. 49, No. 3--4, 295--299 (1996; Zbl 0870.39010)
Kominek, Zygfryd Boundedness and linearity of additive functionals. (English) Zbl 0832.46004 Opusc. Math. 14, 83-87 (1994). MSC: 46A99 28A10 46A20 46A22 PDF BibTeX XML Cite \textit{Z. Kominek}, Opusc. Math. 14, 83--87 (1994; Zbl 0832.46004)
Kominek, Zygfryd Convex functions and some set classes. (English) Zbl 0964.26502 Rocz. Nauk.-Dydakt., Pr. Mat. 13, 187-196 (1993). MSC: 26B25 26B05 90C25 PDF BibTeX XML Cite \textit{Z. Kominek}, Rocz. Nauk.-Dydakt., Pr. Mat. 13, 187--196 (1993; Zbl 0964.26502)
Kominek, Zygfryd Note on polynomial functions. (English) Zbl 0805.39010 Pr. Nauk. Uniw. Śląsk. Katowicach 1399, Ann. Math. Silesianae 7, 7-15 (1993). Reviewer: C.Alsina (Barcelona) MSC: 39B52 PDF BibTeX XML Cite \textit{Z. Kominek}, Pr. Nauk. Uniw. Śląsk. Katowicach, Ann. Math. Silesianae 1399(7), 7--15 (1993; Zbl 0805.39010)
Kominek, Zygfryd On \((a,b)\)-convex functions. (English) Zbl 0754.26005 Arch. Math. 58, No. 1, 64-69 (1992). Reviewer: V.P.Soltan (Kishinev) MSC: 26A51 39B72 52A41 PDF BibTeX XML Cite \textit{Z. Kominek}, Arch. Math. 58, No. 1, 64--69 (1992; Zbl 0754.26005) 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 Convex functions and epigraphs. (English) Zbl 0704.26015 Rad. Mat. 6, No. 1, 97-110 (1990). Reviewer: K.Nikodem MSC: 26A51 39B72 PDF BibTeX XML Cite \textit{Z. Kominek}, Rad. Mat. 6, No. 1, 97--110 (1990; Zbl 0704.26015)
Kominek, Zygfryd Additive and J-convex functions majorized by measurable functions. (English) Zbl 0704.26014 Rad. Mat. 6, No. 1, 49-53 (1990). Reviewer: K.Nikodem MSC: 26A51 39B72 PDF BibTeX XML Cite \textit{Z. Kominek}, Rad. Mat. 6, No. 1, 49--53 (1990; Zbl 0704.26014)
Kominek, Zygfryd The recurrent sequences of inequalities. (English) Zbl 0736.39007 Pr. Nauk. Uniw. Śląsk. Katowicach 1120, Ann. Math. Silesianae 3(15), 41-44 (1990). Reviewer: E.Thandapani (Salem) MSC: 39B72 40A05 PDF BibTeX XML
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 Convex functions in linear spaces. (English) Zbl 0699.46005 Pr. Nauk. Uniw. Śląsk. Katowicach 1087, 70 p. (1989). Reviewer: I.Raşa MSC: 46A55 46G05 26A51 PDF BibTeX XML
Kominek, Z. Some properties of decompositions of a commutative group. (English) Zbl 0691.20042 Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 28, No. 2, 249-252 (1989). Reviewer: P.Lakatos MSC: 20K99 11P99 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 28, No. 2, 249--252 (1989; Zbl 0691.20042)
Kominek, Zygfryd A characterization of convex functions in linear spaces. (English) Zbl 0749.46009 Zesz. Nauk. Akad. Górn.-Hutn. Stanisł. Staszica 1277, Opusc. Math. 5, 71-74 (1989). MSC: 46A55 46G05 PDF BibTeX XML Cite \textit{Z. Kominek}, Zesz. Nauk. Akad. Górn.-Hutn. Stanisł. Staszica, Opusc. Math. 1277(5), 71--74 (1989; Zbl 0749.46009)
Kominek, Z. On an equivalent form of a Steinhaus’ theorem. (English) Zbl 0663.28007 Math., Rev. Anal. Numér. Théor. Approximation, Math. 30(53), No. 1, 25-27 (1988). Reviewer: J.Smítal MSC: 28C10 PDF BibTeX XML Cite \textit{Z. Kominek}, Math. Rev. Anal. Numér. Théor. Approximation, Math. 30(53), No. 1, 25--27 (1988; Zbl 0663.28007)
Kominek, Zygfryd On a problem of K. Nikodem. (English) Zbl 0642.39005 Arch. Math. 50, No. 3, 287-288 (1988). Reviewer: J.Aczél MSC: 39B72 26A51 39B99 46A03 PDF BibTeX XML Cite \textit{Z. Kominek}, Arch. Math. 50, No. 3, 287--288 (1988; Zbl 0642.39005) Full Text: DOI
Kominek, Z. On additive and convex functionals. (English) Zbl 0643.39006 Rad. Mat. 3, 267-279 (1987). Reviewer: J.Na MSC: 39B52 39B72 26A51 PDF BibTeX XML Cite \textit{Z. Kominek}, Rad. Mat. 3, 267--279 (1987; Zbl 0643.39006)
Kominek, Z. On some property of J-concave functions. (English) Zbl 0632.26005 Rad. Mat. 3, 143-147 (1987). Reviewer: J.Aczél MSC: 26A51 46A03 39B72 PDF BibTeX XML Cite \textit{Z. Kominek}, Rad. Mat. 3, 143--147 (1987; Zbl 0632.26005)
Kominek, Z. On a decomposition of the space of real numbers. (English) Zbl 0576.28002 Glas. Mat., III. Ser. 19(39), 231-233 (1984). MSC: 28A05 26A15 PDF BibTeX XML Cite \textit{Z. Kominek}, Glas. Mat., III. Ser. 19(39), 231--233 (1984; Zbl 0576.28002)
Kominek, Z. Some remarks on the set classes \(A^ N_ C\) and \(B^ N_ C\). (English) Zbl 0601.39013 Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 23, 49-52 (1983). Reviewer: M.Sablik MSC: 39B52 39B72 26A15 PDF BibTeX XML Cite \textit{Z. Kominek}, Ann. Soc. Math. Pol., Ser. I, Commentat. Math. 23, 49--52 (1983; Zbl 0601.39013)
Kominek, Z. Measure, category, and the sums of sets. (English) Zbl 0532.28002 Am. Math. Mon. 90, 561-562 (1983). MSC: 28A05 28A12 26A21 54E52 PDF BibTeX XML Cite \textit{Z. Kominek}, Am. Math. Mon. 90, 561--562 (1983; Zbl 0532.28002) Full Text: DOI
Kominek, Z. Some remarks on the Boyd-Wong’s theorem. (English) Zbl 0521.54027 Glas. Mat., III. Ser. 17(37), 313-319 (1982). MSC: 54H25 39B99 PDF BibTeX XML Cite \textit{Z. Kominek}, Glas. Mat., III. Ser. 17(37), 313--319 (1982; Zbl 0521.54027)
Kominek, Zygfryd A generalization of K. Goebel’s and J. Matkowski’s theorems. (English) Zbl 0512.54023 Pr. Nauk. Uniw. Śląsk. Katowicach 425, Pr. Mat. 12, 30-33 (1982). MSC: 54H25 47H10 39B52 PDF BibTeX XML
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
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. On the behaviour of \(C^r\)-solutions of a system of functional equations. (English) Zbl 0407.39001 Rev. Roum. Math. Pures Appl. 23, 1167-1176 (1978). MSC: 39B12 39B62 PDF BibTeX XML Cite \textit{Z. Kominek}, Rev. Roum. Math. Pures Appl. 23, 1167--1176 (1978; Zbl 0407.39001)
Kominek, Zygfryd On the uniqueness and the existence of solutions with some asymptotic properties of a system of functional equations. (English) Zbl 0364.39003 Prace Nauk. Uniw. Slaski. Katowicach 158, Prace Mat. 7, 57-63 (1977). MSC: 39B05 39B99 PDF BibTeX XML
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, Zygfryd Some generalization of the theorem of S. Piccard. (English) Zbl 0268.26003 Prace nauk Uniw. Slaski. Katowicach 37, Prace Mat. 4, 31-33 (1973). MSC: 26A15 26A21 54C50 PDF BibTeX XML
Kominek, Z. On the sum and difference of two sets in topological vector spaces. (English) Zbl 0214.37403 Fundam. Math. 71, 165-169 (1971). MSC: 46A35 54C50 PDF BibTeX XML Cite \textit{Z. Kominek}, Fundam. Math. 71, 165--169 (1971; Zbl 0214.37403) Full Text: DOI EuDML