English

On the existence of a (2,3)-spread in V(7,2)

Combinatorics 2011-01-28 v1 Information Theory math.IT

Abstract

An (s,t)(s,t)-spread in a finite vector space V=V(n,q)V=V(n,q) is a collection F\mathcal F of tt-dimensional subspaces of VV with the property that every ss-dimensional subspace of VV is contained in exactly one member of F\mathcal F. It is remarkable that no (s,t)(s,t)-spreads has been found yet, except in the case s=1s=1. In this note, the concept α\alpha-point to a (2,3)(2,3)-spread F\mathcal F in {V=V(7,2)V=V(7,2)} is introduced. A classical result of Thomas, applied to the vector space VV, states that all points of VV cannot be α\alpha-points to a given (2,3)(2,3)-spread F\mathcal F in VV. {In this note, we strengthened this result by proving that} every 6-dimensional subspace of VV must contain at least one point that is not an α\alpha-point to a given (2,3)(2,3)-spread of VV.

Keywords

Cite

@article{arxiv.1101.5336,
  title  = {On the existence of a (2,3)-spread in V(7,2)},
  author = {Olof Heden and Papa A. Sissokho},
  journal= {arXiv preprint arXiv:1101.5336},
  year   = {2011}
}