Decomposing the complete r -graph

Let fr(n) be the minimum number of complete r-partite r-graphs needed to partition the edge set of the complete r-uniform hypergraph on n vertices. Graham and Pollak showed that f2(n)=n−1. An easy construction shows that fr(n)≤(1−o(1))(n⌊r/2⌋) and it has been unknown if this upper bound is asymptoti...

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Bibliographic Details
Main Authors: Leader, Imre, Milicevic, Luka, Tan, Ta Sheng
Format: Article
Published: Elsevier 2018
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Online Access:http://eprints.um.edu.my/21539/
https://doi.org/10.1016/j.jcta.2017.08.008
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Institution: Universiti Malaya
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Summary:Let fr(n) be the minimum number of complete r-partite r-graphs needed to partition the edge set of the complete r-uniform hypergraph on n vertices. Graham and Pollak showed that f2(n)=n−1. An easy construction shows that fr(n)≤(1−o(1))(n⌊r/2⌋) and it has been unknown if this upper bound is asymptotically sharp. In this paper we show that fr(n)≤([formula presented]+o(1))(nr/2) for each even r≥4.