Ramzanpour, Elahe; Bodaghi, Abasalt Approximate multi-Jensen-cubic mappings and a fixed point theorem. (English) Zbl 1524.39056 Ann. Univ. Paedagog. Crac., Stud. Math. 340(19), 141-154 (2020). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{E. Ramzanpour} and \textit{A. Bodaghi}, Ann. Univ. Paedagog. Crac., Stud. Math. 340(19), 141--154 (2020; Zbl 1524.39056) Full Text: DOI
Lehlou, Fouad; Moussa, Mohammed; Roukbi, Ahmed; Kabbaj, Samir On the superstability of the cosine and sine type functional equations. (English) Zbl 1355.39035 Ann. Univ. Paedagog. Crac., Stud. Math. 182(15), 113-121 (2016). MSC: 39B82 39B32 PDFBibTeX XMLCite \textit{F. Lehlou} et al., Ann. Univ. Paedagog. Crac., Stud. Math. 182(15), 113--121 (2016; Zbl 1355.39035)
El-Fassi, Iz-iddine On the superstability of generalized d’Alembert harmonic functions. (English) Zbl 1355.39033 Ann. Univ. Paedagog. Crac., Stud. Math. 182(15), 5-13 (2016). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{I.-i. El-Fassi}, Ann. Univ. Paedagog. Crac., Stud. Math. 182(15), 5--13 (2016; Zbl 1355.39033)
Aribou, Youssef; Dimou, Hajira; Chahbi, Abdellatif; Kabbaj, Samir Stability of generalized quadratic functional equation on a set of measure zero. (English) Zbl 1329.39031 Ann. Univ. Paedagog. Crac., Stud. Math. 160(14), 149-162 (2015). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{Y. Aribou} et al., Ann. Univ. Paedagog. Crac., Stud. Math. 160(14), 149--162 (2015; Zbl 1329.39031)
Moszner, Zenon On the stability of the squares of some functional equations. (English) Zbl 1329.39033 Ann. Univ. Paedagog. Crac., Stud. Math. 160(14), 81-104 (2015). MSC: 39B82 39B62 PDFBibTeX XMLCite \textit{Z. Moszner}, Ann. Univ. Paedagog. Crac., Stud. Math. 160(14), 81--104 (2015; Zbl 1329.39033)
Moszner, Zenon On stability of some functional equations and topology of their target spaces. (English) Zbl 1292.39027 Ann. Univ. Paedagog. Crac. 122, Stud. Math. 11, 69-94 (2012). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{Z. Moszner}, Ann. Univ. Paedagog. Crac., Stud. Math. 122(11), 69--94 (2012; Zbl 1292.39027)
Mach, Andrzej; Moszner, Zenon Unstable (stable) system of stable (unstable) functional equations. (English) Zbl 1298.39028 Ann. Univ. Paedagog. Crac. 84, Stud. Math. 9, 43-47 (2010). Reviewer: Mohsen Alimohammady (Babolsar) MSC: 39B82 PDFBibTeX XMLCite \textit{A. Mach} and \textit{Z. Moszner}, Ann. Univ. Paedagog. Crac., Stud. Math. 84(9), 43--47 (2010; Zbl 1298.39028)