Song, Wenhua A remark on coapproximation. (English) Zbl 0830.46009 J. Math. Res. Expo. 14, No. 4, 547-551 (1994). Summary: We show that the cometric projection \(R_Y\) admits a linear selection when \(Y\) is 1-dimensional or 1-codimensional and a finite dimensional subspace of a Banach space may be non-coproximinal. Cited in 1 Document MSC: 46B20 Geometry and structure of normed linear spaces 41A50 Best approximation, Chebyshev systems Keywords:coChebyshev; cometric projection; linear selection PDF BibTeX XML Cite \textit{W. Song}, J. Math. Res. Expo. 14, No. 4, 547--551 (1994; Zbl 0830.46009)