Chahbi, Abdellatif; Kabbaj, Samir Linear maps preserving \(G\)-unitary operators in Hilbert space. (English) Zbl 1309.15043 Arab J. Math. Sci. 21, No. 1, 109-117 (2015). MSC: 15A86 15A04 47B50 47L30 16W20 PDFBibTeX XMLCite \textit{A. Chahbi} and \textit{S. Kabbaj}, Arab J. Math. Sci. 21, No. 1, 109--117 (2015; Zbl 1309.15043) Full Text: DOI
Chahbi, A. B.; Charifi, A.; Bouikhalene, B.; Kabbaj, S. Operatorial approach to the non-Archimedean stability of a Pexider K-quadratic functional equation. (English) Zbl 1308.39022 Arab J. Math. Sci. 21, No. 1, 67-83 (2015). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{A. B. Chahbi} et al., Arab J. Math. Sci. 21, No. 1, 67--83 (2015; Zbl 1308.39022) Full Text: DOI