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Existence of generalized Bhaskar Rao designs with block size 3
Authors:R. Julian R. Abel  Diana Combe
Affiliation:a School of Mathematics and Statistics, The University of New South Wales, NSW 2052, Australia
b School of Mathematics and Statistics, The University of Sydney, NSW 2006, Australia
Abstract:
There are well-known necessary conditions for the existence of a generalized Bhaskar Rao design over a group G, with block size k=3. The recently proved Hall-Paige conjecture shows that these are sufficient when v=3 and λ=|G|. We prove these conditions are sufficient in general when v=3, and also when |G| is small, or when G is dicyclic. We summarize known results supporting the conjecture that these necessary conditions are always sufficient when k=3.
Keywords:Generalized Bhaskar Rao design   Dicyclic group   Group divisible design
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