Vestfrid, Igor A. Quasi-isometries in continuous functions spaces. (English) Zbl 07783144 Proc. Am. Math. Soc. 152, No. 2, 739-748 (2024). Reviewer: Sheldon Dantas (València) MSC: 46B04 46B25 46E15 39B82 PDFBibTeX XMLCite \textit{I. A. Vestfrid}, Proc. Am. Math. Soc. 152, No. 2, 739--748 (2024; Zbl 07783144) Full Text: DOI
Vestfrid, I. A. Near-isometries of the unit sphere. (English) Zbl 07269265 Ukr. Math. J. 72, No. 4, 663-670 (2020) and Ukr. Mat. Zh. 72, No. 4, 575-580 (2020). MSC: 47-XX 46-XX PDFBibTeX XMLCite \textit{I. A. Vestfrid}, Ukr. Math. J. 72, No. 4, 663--670 (2020; Zbl 07269265) Full Text: DOI
Vestfrid, Igor A. Addendum to: “\(\varepsilon\)-isometries in Euclidean spaces”. (English) Zbl 1115.51008 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 67, No. 4, 1306-1307 (2007). MSC: 51M05 39B82 39B52 PDFBibTeX XMLCite \textit{I. A. Vestfrid}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 67, No. 4, 1306--1307 (2007; Zbl 1115.51008) Full Text: DOI
Vestfrid, Igor A. \(\epsilon\)-isometries in Euclidean spaces. (English) Zbl 1088.51010 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 8, 1191-1198 (2005). Reviewer: Georgi Hristov Georgiev (Shumen) MSC: 51M05 46B04 PDFBibTeX XMLCite \textit{I. A. Vestfrid}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 63, No. 8, 1191--1198 (2005; Zbl 1088.51010) Full Text: DOI
Vestfrid, I. A. Affine properties and injectivity of quasi-isometries. (English) Zbl 1067.46005 Isr. J. Math. 141, 185-210 (2004). Reviewer: Konrad Swanepoel (Unisa) MSC: 46B04 46B20 39B82 PDFBibTeX XMLCite \textit{I. A. Vestfrid}, Isr. J. Math. 141, 185--210 (2004; Zbl 1067.46005) Full Text: DOI