Title
Blocking and Double Blocking Sets in Finite Planes.
Abstract
In this paper, by using properties of Baer subplanes, we describe the construction of a minimal blocking set in the Hall plane of order q(2) of size q(2) + 2q + 2 admitting 1-,2-,3-,4-, (q + 1)- and (q + 2)-secants. As a corollary, we obtain the existence of a minimal blocking set of a non-Desarguesian affine plane of order q(2) of size at most 4q(2)/3 + 5q/3, which is considerably smaller than 2q(2) - 1, the Jamison bound for the size of a minimal blocking set in an affine Desarguesian plane of order q(2). We also consider particular Andre planes of order q, where q is a power of the prime p, and give a construction of a small minimal blocking set which admits a secant line not meeting the blocking set in 1 mod p points. Furthermore, we elaborate on the connection of this problem with the study of value sets of certain polynomials and with the construction of small double blocking sets in Desarguesian projective planes; in both topics we provide some new results.
Year
Venue
Keywords
2016
ELECTRONIC JOURNAL OF COMBINATORICS
minimal blocking set,Baer subplane,stabiliser of a Baer subplane,Hall plane,Andre plane,double blocking set,value set of polynomials
Field
DocType
Volume
Affine transformation,Prime (order theory),Blocking set,Discrete mathematics,Combinatorics,Polynomial,Secant line,Projective plane,Corollary,Mathematics
Journal
23.0
Issue
ISSN
Citations 
2.0
1077-8926
1
PageRank 
References 
Authors
0.36
0
4
Name
Order
Citations
PageRank
Jan De Beule15211.34
Tamás Héger2365.16
Tamás Szőnyi36411.14
van de voorde4357.85