Geodesic
Bisecants of Finite Collections of Sets in Linear Spaces
Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 375-380

Voir la notice de l'article provenant de la source Cambridge University Press

The question posed by Sylvester (6) concerning the collinearity of a finite set of points in E2 having the property that each two together with some third be collinear has been the inspiration for numerous investigations. The original question was answered by the following theorem. 
Edelstein, M.; Kelly, L. M. Bisecants of Finite Collections of Sets in Linear Spaces. Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 375-380. doi: 10.4153/CJM-1966-039-2
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