Bendaoud, Zohra; Esterle, Jean; Mokhtari, Abdelkader Distances between exponentials and powers of elements of certain Banach algebras. (Distances entre exponentielles et puissances d’éléments de certaines algèbres de Banach.) (English) Zbl 1134.46028 Arch. Math. 89, No. 3, 243-253 (2007). MSC: 46H20 PDFBibTeX XMLCite \textit{Z. Bendaoud} et al., Arch. Math. 89, No. 3, 243--253 (2007; Zbl 1134.46028) Full Text: DOI
Berkani, M.; Esterle, J.; Mokhtari, A. Distance between powers of a bounded approximate identity. (Distance entre puissances d’une unité approchée bornée.) (French) Zbl 1050.46034 J. Lond. Math. Soc., II. Ser. 67, No. 2, 461-480 (2003). Reviewer: Armando R. Villena (Granada) MSC: 46H05 PDFBibTeX XMLCite \textit{M. Berkani} et al., J. Lond. Math. Soc., II. Ser. 67, No. 2, 461--480 (2003; Zbl 1050.46034) Full Text: DOI
Esterle, J.; Mokhtari, A. Distance entre éléments d’un semi-groupe dans une algébre de Banach. (Distance between the elements of a semigroup in a Banach algebra). (French) Zbl 1032.47022 J. Funct. Anal. 195, No. 1, 167-189 (2002). Reviewer: Catalin Badea (Villeneuve d’Ascq) MSC: 47D06 46H05 PDFBibTeX XMLCite \textit{J. Esterle} and \textit{A. Mokhtari}, J. Funct. Anal. 195, No. 1, 167--189 (2002; Zbl 1032.47022) Full Text: DOI