Borosh, Itshak; Chui, Charles K.; Smith, Philip W. Best uniform approximation from a collection of subspaces. (English) Zbl 0366.41012 Math. Z. 156, 13-18 (1977). MSC: 41A65 41A50 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Stockenberg, Bernd On the number of zeros of functions in a weak Tchebyshev-Space. (English) Zbl 0349.41019 Math. Z. 156, 49-57 (1977). MSC: 41A65 41A50 × Cite Format Result Cite Review PDF Full Text: DOI EuDML