Lee, Yang-Hi; Jung, Soon-Mo; Rassias, Michael Th. On an \(n\)-dimensional mixed type additive and quadratic functional equation. (English) Zbl 1364.39023 Appl. Math. Comput. 228, 13-16 (2014). MSC: 39B82 PDFBibTeX XMLCite \textit{Y.-H. Lee} et al., Appl. Math. Comput. 228, 13--16 (2014; Zbl 1364.39023) Full Text: DOI
Forti, Gian Luigi Stability of quadratic and Drygas functional equations, with an application for solving an alternative quadratic equation. (English) Zbl 1311.39044 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, 155-179 (2014). MSC: 39B82 PDFBibTeX XMLCite \textit{G. L. Forti}, Springer Optim. Appl. 96, 155--179 (2014; Zbl 1311.39044) Full Text: DOI
Chang, Ick-Soon; Lee, Yang-Hi Additive and quadratic type functional equation and its fuzzy stability. (English) Zbl 1268.39028 Result. Math. 63, No. 3-4, 717-730 (2013). MSC: 39B82 46S40 39B52 PDFBibTeX XMLCite \textit{I.-S. Chang} and \textit{Y.-H. Lee}, Result. Math. 63, No. 3--4, 717--730 (2013; Zbl 1268.39028) Full Text: DOI
Lee, Yang-Hi; Jung, Soon-Mo; Rassias, Themistocles M. Stability of the \(n\)-dimensional mixed-type additive and quadratic functional equation in non-Archimedean normed spaces. (English) Zbl 1237.39035 Abstr. Appl. Anal. 2012, Article ID 401762, 9 p. (2012). MSC: 39B82 PDFBibTeX XMLCite \textit{Y.-H. Lee} et al., Abstr. Appl. Anal. 2012, Article ID 401762, 9 p. (2012; Zbl 1237.39035) Full Text: DOI
Jin, Sun Sook; Lee, Yang-Hi A fixed point approach to the stability of the Cauchy additive and quadratic type functional equation. (English) Zbl 1303.39017 J. Appl. Math. 2011, Article ID 817079, 16 p. (2011). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{S. S. Jin} and \textit{Y.-H. Lee}, J. Appl. Math. 2011, Article ID 817079, 16 p. (2011; Zbl 1303.39017) Full Text: DOI
Jin, Sun Sook; Lee, Yang Hi Fuzzy stability of a quadratic-additive functional equation. (English) Zbl 1227.39025 Int. J. Math. Math. Sci. 2011, Article ID 504802, 16 p. (2011). MSC: 39B82 39B22 26E50 PDFBibTeX XMLCite \textit{S. S. Jin} and \textit{Y. H. Lee}, Int. J. Math. Math. Sci. 2011, Article ID 504802, 16 p. (2011; Zbl 1227.39025) Full Text: DOI