Li, Chong On well posedness of best simultaneous approximation problems in Banach spaces. (English) Zbl 1054.41011 Sci. China, Ser. A 44, No. 12, 1558-1570 (2001). MSC: 41A28 41A65 46B20 49K40 PDFBibTeX XMLCite \textit{C. Li}, Sci. China, Ser. A 44, No. 12, 1558--1570 (2001; Zbl 1054.41011) Full Text: DOI
Li, Chong; Wang, Xinghua Almost Chebyshev set with respect to bounded subsets. (English) Zbl 0896.46008 Sci. China, Ser. A 40, No. 4, 375-383 (1997). MSC: 46B20 PDFBibTeX XMLCite \textit{C. Li} and \textit{X. Wang}, Sci. China, Ser. A 40, No. 4, 375--383 (1997; Zbl 0896.46008) Full Text: DOI