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Bounds for the number of meeting edges in graph partitioning

Qinghou ZengJianfeng Hou — 2017

Czechoslovak Mathematical Journal

Let G be a weighted hypergraph with edges of size at most 2. Bollobás and Scott conjectured that G admits a bipartition such that each vertex class meets edges of total weight at least ( w 1 - Δ 1 ) / 2 + 2 w 2 / 3 , where w i is the total weight of edges of size i and Δ 1 is the maximum weight of an edge of size 1. In this paper, for positive integer weighted hypergraph G (i.e., multi-hypergraph), we show that there exists a bipartition of G such that each vertex class meets edges of total weight at least ( w 0 - 1 ) / 6 + ( w 1 - Δ 1 ) / 3 + 2 w 2 / 3 , where w 0 is the number...

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