Matkowski, Janusz Mean invariance identity. (English) Zbl 1449.33003 Publ. Math. Debr. 95, No. 1-2, 133-144 (2019). MSC: 33B15 26E30 39B12 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 95, No. 1--2, 133--144 (2019; Zbl 1449.33003) Full Text: DOI
Matkowski, Janusz Characterization of the Euler gamma function with the aid of an arbitrary mean. (English) Zbl 1413.33004 Publ. Math. Debr. 93, No. 1-2, 163-170 (2018). Reviewer: Thomas Ernst (Uppsala) MSC: 33B15 26E30 39B12 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 93, No. 1--2, 163--170 (2018; Zbl 1413.33004) Full Text: DOI
Kahlig, P.; Matkowski, J. Invariant means related to classical weighted means. (English) Zbl 1399.26086 Publ. Math. Debr. 89, No. 3, 373-387 (2016). MSC: 26E60 39B12 39B22 PDFBibTeX XMLCite \textit{P. Kahlig} and \textit{J. Matkowski}, Publ. Math. Debr. 89, No. 3, 373--387 (2016; Zbl 1399.26086) Full Text: DOI
Matkowski, Janusz Invariance of Bajraktarevič mean with respect to quasi arithmetic means. (English) Zbl 1274.26086 Publ. Math. Debr. 80, No. 3-4, 441-455 (2012). Reviewer: Mihály Bessenyei (Debrecen) MSC: 26E60 26A18 39B22 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 80, No. 3--4, 441--455 (2012; Zbl 1274.26086) Full Text: DOI
Matkowski, Janusz Generalized convex functions and a solution of a problem of Zs. Páles. (English) Zbl 1212.26069 Publ. Math. Debr. 73, No. 3-4, 421-460 (2008). Reviewer: Mihály Bessenyi (Debrecen) MSC: 26E30 39B22 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 73, No. 3--4, 421--460 (2008; Zbl 1212.26069)
Matkowski, Janusz Solution of a regularity problem in equality of Cauchy means. (English) Zbl 1077.39022 Publ. Math. Debr. 64, No. 3-4, 391-400 (2004). Reviewer: László Losonczi (Debrecen) MSC: 39B22 26A24 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 64, No. 3--4, 391--400 (2004; Zbl 1077.39022)
Gronau, D.; Matkowski, J. Another characterization of the gamma function. (English) Zbl 1027.33001 Publ. Math. Debr. 63, No. 1-2, 105-113 (2003). MSC: 33B15 39A13 PDFBibTeX XMLCite \textit{D. Gronau} and \textit{J. Matkowski}, Publ. Math. Debr. 63, No. 1--2, 105--113 (2003; Zbl 1027.33001)
Głazowska, Dorota; Jarczyk, Witold; Matkowski, Janusz Arithmetic mean as a linear combination of two quasi-arithmetic means. (English) Zbl 1012.26022 Publ. Math. Debr. 61, No. 3-4, 455-467 (2002). Reviewer: Zsolt Páles (Debrecen) MSC: 26E60 39B12 PDFBibTeX XMLCite \textit{D. Głazowska} et al., Publ. Math. Debr. 61, No. 3--4, 455--467 (2002; Zbl 1012.26022)
Matkowski, Janusz Continuous solutions of a functional equation. (English) Zbl 0909.39009 Publ. Math. Debr. 52, No. 3-4, 559-562 (1998). Reviewer: Zsolt Páles (Debrecen) MSC: 39B52 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 52, No. 3--4, 559--562 (1998; Zbl 0909.39009)
Matkowski, J. The converse of a generalized Hölder inequality. (English) Zbl 0881.26009 Publ. Math. Debr. 50, No. 1-2, 135-143 (1997). Reviewer: Zsolt Páles (Debrecen) MSC: 26D15 26A51 39B72 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 50, No. 1--2, 135--143 (1997; Zbl 0881.26009)
Matkowski, Janusz Nonlinear contractions in metrically convex space. (English) Zbl 0824.47047 Publ. Math. Debr. 45, No. 1-2, 103-114 (1994). MSC: 47H10 54H25 47S50 26D20 26A16 26A51 39B12 47H40 PDFBibTeX XMLCite \textit{J. Matkowski}, Publ. Math. Debr. 45, No. 1--2, 103--114 (1994; Zbl 0824.47047)
Baron, K.; Ger, R.; Matkowski, J. Analytic solutions of a system of functional equations. (English) Zbl 0322.39016 Publ. Math. Debr. 22, 189-194 (1975). MSC: 39B99 PDFBibTeX XMLCite \textit{K. Baron} et al., Publ. Math. Debr. 22, 189--194 (1975; Zbl 0322.39016)