Miličić, P. M. La fonctionnelle g et quelques problèmes des meilleures approximations dans des espaces normés. (The g-functional and some problems of best approximation in normed spaces). (French) Zbl 0723.46009 Publ. Inst. Math., Nouv. Sér. 48(62), 110-118 (1990). A new characterization of the element of the best approximation in a real normed space is given. Besides, three kinds of projections of vectors on subspaces of that space are introduced, and some relations between these projections are proved. Reviewer: A.Torgašev (Beograd) Cited in 3 Documents MSC: 46B20 Geometry and structure of normed linear spaces 41A50 Best approximation, Chebyshev systems Keywords:best approximation in a real normed space PDFBibTeX XMLCite \textit{P. M. Miličić}, Publ. Inst. Math., Nouv. Sér. 48(62), 110--118 (1990; Zbl 0723.46009)