Minimal homogeneous Steiner 2-(v,3) trades |
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Authors: | Nicholas J Cavenagh Diane M Donovan Emine Şule Yazıcı |
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Institution: | 1. School of Mathematics, The University of New South Wales, NSW 2052, Australia;2. Centre for Discrete Mathematics and Computing, University of Queensland, St Lucia 4072, Australia;3. Koç University Rumeli Feneri Yolu, 34450 Sar?yer Istanbul, Turkey;1. UK;2. UK;3. UK;4. UK;5. UK;6. UK |
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Abstract: | A Steiner 2- trade is a pair of disjoint partial Steiner triple systems, each on the same set of points, such that each pair of points occurs in if and only if it occurs in . A Steiner 2- trade is called d-homogeneous if each point occurs in exactly d blocks of (or ). In this paper we construct minimal d-homogeneous Steiner 2- trades of foundation and volume for sufficiently large values of . (Specifically, if is divisible by 3 and otherwise.) |
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