The Fine Structure of Balanced Ternary Designs with Block Size Three, Index Three and \(\rho_2 = 1,2\)

Peter Adams1, Darryn E. Bryant1, A. Khodkar1
1Centre for Discrete Mathematics and Computing Department of Mathematics The University of Queensland Queensland 4072 Australia

Abstract

In this paper, necessary and sufficient conditions for a vector to be the fine structure of a balanced ternary design with block size \(3\), index \(3\) and \(\rho_2 = 1\) and \(2\) are determined, with one unresolved case.