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Scientific notes and problems
Parallelism and perpendicularity of straight lines, planes and hyperplanes in three-dimensional and four-dimensional Lobachevskii spaces
D. D. Mordukhai-Boltovskii
Citation:
D. D. Mordukhai-Boltovskii, “Parallelism and perpendicularity of straight lines, planes and hyperplanes in three-dimensional and four-dimensional Lobachevskii spaces”, Russian Math. Surveys, 6:4 (1951)
Linking options:
https://www.mathnet.ru/eng/rm6871 https://www.mathnet.ru/eng/rm/v6/i4/p176
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