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The geometry of Hilbert space. (Geometrie Hilbertova prostoru.). (Czech) Zbl 0381.46013
Matematicky Seminar. SNTL. Prague: SNTL - Nakladelstvi Technicke Literatury. 246 p. Kcs. 16.00 (1973).

46C05 Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product)
46-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to functional analysis
47B06 Riesz operators; eigenvalue distributions; approximation numbers, \(s\)-numbers, Kolmogorov numbers, entropy numbers, etc. of operators