2N noncollinear points determine at least 2N directions
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Publication:1170240
DOI10.1016/0097-3165(82)90045-0zbMath0496.05001OpenAlexW1998563847MaRDI QIDQ1170240
Publication date: 1982
Published in: Journal of Combinatorial Theory. Series A (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1016/0097-3165(82)90045-0
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