Lehlou, F.; Moussa, M.; Roukbi, A.; Kabbaj, S. Superstability of a Van Vleck’s type functional equation for the sine. (English) Zbl 1413.39049 Afr. Mat. 29, No. 5-6, 861-867 (2018). MSC: 39B52 39B82 PDFBibTeX XMLCite \textit{F. Lehlou} et al., Afr. Mat. 29, No. 5--6, 861--867 (2018; Zbl 1413.39049) 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)
Zeglami, D.; Roukbi, A.; Kabbaj, S. Hyers-Ulam stability of generalized Wilson’s and d’Alembert’s functional equations. (English) Zbl 1315.39020 Afr. Mat. 26, No. 1-2, 215-223 (2015). Reviewer: Gian Luigi Forti (Milano) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{D. Zeglami} et al., Afr. Mat. 26, No. 1--2, 215--223 (2015; Zbl 1315.39020) Full Text: DOI
Zeglami, D.; Roukbi, A.; Rassias, Themistocles M. D’Alembert’s functional equation and superstability problem in hypergroups. (English) Zbl 1314.39038 Rassias, Themistocles M. (ed.), Handbook of functional equations. Stability theory. New York, NY: Springer (ISBN 978-1-4939-1285-8/hbk; 978-1-4939-1286-5/ebook). Springer Optimization and Its Applications 96, 367-396 (2014). MSC: 39B82 PDFBibTeX XMLCite \textit{D. Zeglami} et al., Springer Optim. Appl. 96, 367--396 (2014; Zbl 1314.39038) Full Text: DOI