Decomposition of the completer-graph into completer-partiter-graphs
Decomposition of the completer-graph into completer-partiter-graphs
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将完整图分解为完整部分图
DOI:
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发表时间:
1986
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通讯作者:
Noga Alon
中科院分区:
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作者:
Noga Alon
Forn ≥ r ≥ 1, letfr(n) denote the minimum numberq, such that it is possible to partition all edges of the completer-graph onn vertices intoq completer-partiter-graphs. Graham and Pollak showed thatf2(n) =n − 1. Here we observe thatf3(n) =n − 2 and show that for every fixedr ≥ 2, there are positive constantsc1(r) andc2(r) such thatc1(r) ≤fr(n)⋅n−[r/2] ≤n2(r) for alln ≥ r. This solves a problem of Aharoni and Linial. The proof uses some simple ideas of linear algebra.