Geodesic
Covering all points except one
Journal of Algebraic Combinatorics, Tome 32 (2010) no. 1, pp. 59-66.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: In many point-line geometries, to cover all points except one, more lines are needed than to cover all points. Bounds can be given by looking at the dimension of the space of functions induced by polynomials of bounded degree.
Keywords: keywords finite geometry, covering, blocking set 
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     title = {Covering all points except one},
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Blokhuis, A.; Brouwer, A.E.; Szőnyi, T. Covering all points except one. Journal of Algebraic Combinatorics, Tome 32 (2010) no. 1, pp. 59-66. http://geodesic.mathdoc.fr/item/JAC_2010__32_1_a4/