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University of the Western Cape

On the primarity of some block intersection graphs

Abstract

dc:description.abstract

A tactical con guration consists of a nite set V of points, a nite set B of blocks and an incidence relation between them, so that all blocks are incident with the same number k points, and all points are incident with the same number r of blocks (See [14] for example ). If v := jV j and b := jBj; then v; k; b; r are known as the parameters of the con guration. Counting incident point-block pairs, one sees that vr = bk: In this thesis, we generalize tactical con gurations on Steiner triple systems obtained from projective geometry. Our objects are subgeometries as blocks. These subgeometries are collected into systems and we study them as designs and graphs. Considered recursively is a further tactical con guration on some of the designs obtained and in what follows, we obtain similar structures as the Steiner triple systems from projective geometry. We also study these subgeometries as factorizations and examine the automorphism group of the new structures. These tactical con gurations at rst sight do not form interesting structures. However, as will be shown, they o er some level of intriguing symmetries. It will be shown that they inherit the automorphism group of the parent geometry.

Degree

thesis:*
Grantor dc:publisher.institution
University of the Western Cape
Year dc:date.issued
2018

Author and committee

dc:creator, dc:contributor.*
Author dc:creator
  • Vodah, Sunday

Subjects

dc:subject × 5

Rights

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Chain of custody

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University of the Western Cape
Base URL
uwcscholar.uwc.ac.za:8443/server/oai/request
Last updated
2026-07-24
Source record
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citation

Vodah, Sunday. On the primarity of some block intersection graphs. University of the Western Cape, 2018.