Levin, A. Yu.; Petunin, Yu. I. Some problems connected with the definition of orthogonality in a Banach space. (Russian) Zbl 0171.33302 Usp. Mat. Nauk 18, No. 3(111), 167-170 (1963). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:functional analysis PDF BibTeX XML Cite \textit{A. Yu. Levin} and \textit{Yu. I. Petunin}, Usp. Mat. Nauk 18, No. 3(111), 167--170 (1963; Zbl 0171.33302)