𝔖 Bobbio Scriptorium
✦   LIBER   ✦

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

No coin nor oath required. For personal study only.

✦ 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


📜 SIMILAR VOLUMES


On large minimal blocking sets in PG(2,q
✍ Tamás Szőnyi; Antonello Cossidente; András Gács; Csaba Mengyán; Alessandro Sicil 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 172 KB

## 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

Blocking sets of nonsecant lines to a co
✍ Angela Aguglia; Gábor Korchmáros 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 115 KB

## 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

Substantial reduction of the gastric car
✍ Beatriz Carvalho; Raquel Seruca; Fátima Carneiro; Charles H.C.M. Buys; Klaas Kok 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 133 KB

Deletions of the long arm of chromosome 6 are a common event in gastric carcinomas. In a previous study, deletion mapping of 6q identified two smallest regions of overlap (SROs) of heterozygous deletions: one interstitial, spanning 12-16 cM, bordered by D6S268 (6q16.3-q21) and ARG1 (6q22.3-q23.1), a

Defining the region(s) of deletion at 6q
✍ Eija-Riitta Hyytinen; Rega Saadut; Ceshi Chen; Lindsay Paull; Pasi A. Koivisto; 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 200 KB

## Abstract Deletion of the long arm of chromosome 6 (6q) frequently occurs in many neoplasms, including carcinomas of the prostate and breast and melanoma, suggesting the location of a tumor‐suppressor gene or genes at 6q. At present, however, the region of deletion has not been well defined, and