Rudin, W.; Smith, K. T. Linearity of best approximation: a characterization of ellipsoids. (English) Zbl 0098.08002 Nederl. Akad. Wet., Proc., Ser. A 64, 97-103 (1961). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 7 Documents Keywords:functional analysis × Cite Format Result Cite Review PDF