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A remark on blocking sets of almost Rédei type

✍ Scribed by András Gács

Publisher
Springer
Year
1997
Tongue
English
Weight
420 KB
Volume
60
Category
Article
ISSN
0047-2468

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We prove that the number of directions determined by a set of p points in AG(2, p), p prime, cannot be between ( p+3)Â2 and ( p&1)Â2+ 1 3 -p. This is equivalent to saying that besides the projective triangle, every blocking set of Re dei type in PG(2, p) has size at least 3( p&1)Â2+ 1 3 -p.