Brzdȩk, Janusz; Popa, Dorian; Xu, Bing Remarks on stability and non-stability of the linear functional equation of the first order. (English) Zbl 1334.39057 Appl. Math. Comput. 238, 141-148 (2014). MSC: 39B82 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., Appl. Math. Comput. 238, 141--148 (2014; Zbl 1334.39057) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing Remarks on stability of the linear functional equation in single variable. (English) Zbl 1248.39022 Pardalos, Panos M. (ed.) et al., Nonlinear analysis. Stability, approximation, and inequalities. In honor of Themistocles M. Rassias on the occasion of his 60th birthday. New York, NY: Springer (ISBN 978-1-4614-3497-9/hbk; 978-1-4614-3498-6/ebook). Springer Optimization and Its Applications 68, 91-119 (2012). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., Springer Optim. Appl. 68, 91--119 (2012; Zbl 1248.39022) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing On approximate solutions of the linear functional equation of higher order. (English) Zbl 1204.65147 J. Math. Anal. Appl. 373, No. 2, 680-689 (2011). Reviewer: Jan Sieber (Portsmouth) MSC: 65Q20 39B12 39B82 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., J. Math. Anal. Appl. 373, No. 2, 680--689 (2011; Zbl 1204.65147) Full Text: DOI