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On the cardinality of blocking sets in PG(2,q)

✍ Scribed by Luigia Berardi; Franco Eugeni

Book ID
112500862
Publisher
Springer
Year
1984
Tongue
English
Weight
391 KB
Volume
22
Category
Article
ISSN
0047-2468

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## Abstract The size of large minimal blocking sets is bounded by the Bruen–Thas upper bound. The bound is sharp when __q__ is a square. Here the bound is improved if __q__ is a non‐square. On the other hand, we present some constructions of reasonably large minimal blocking sets in planes of non‐p

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## Abstract In a previous paper 1, all point sets of minimum size in __PG__(2,__q__), blocking all external lines to a given irreducible conic ${\cal C}$, have been determined for every odd __q__. Here we obtain a similar classification for those point sets of minimum size, which meet every externa