## 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
The smallest minimal blocking sets of Q(6, q), q even
✍ Scribed by J. De Beule; L. Storme
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 155 KB
- Volume
- 11
- Category
- Article
- ISSN
- 1063-8539
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✦ Synopsis
Abstract
We characterize the smallest minimal blocking sets of Q(6,q), q even and q ≥ 32. We obtain this result using projection arguments which translate the problem into problems concerning blocking sets of Q(4,q). Then using results on the size of the smallest minimal blocking sets of Q(4,q), q even, of Eisfeld et al. (2001) Discrete Math 238(1–3): 35–51, and results concerning the number of internal nuclei of (q + 2)‐sets in PG(2,q), q even, of Bichara and Korchmáros [1982; Note on], we obtain the characterization. © 2003 Wiley Periodicals, Inc. J Combin Designs 11: 290–303, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jcd.10048
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