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has been cited by the following article:
TITLE: Relative Widths of Some Sets of lmp
AUTHORS: Weiwei Xiao, Weijun Luan
KEYWORDS: Kolmogorov Widths, Relative Widths
JOURNAL NAME: Advances in Pure Mathematics, Vol.1 No.2, March 30, 2011
ABSTRACT: n this paper, the relative widths of some sets in are studied. Relative widths is the further development of Kolmogorov widths and it is a new problem in approximation theory which aroused some mathematics workers great interest recently. We present some basic propositions of relative widths and investigate relative widths of some sets (ball or ellipsoid) of