The connectivity of a graph and its complement
The connectivity of a graph and its complement
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DOI:
10.1016/j.dam.2008.05.012
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发表时间:
2008-10
期刊:
影响因子:
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通讯作者:
Angelika Hellwig;L. Volkmann
中科院分区:
文献类型:
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作者:
Angelika Hellwig;L. Volkmann
Let G be a graph with minimum degree δ(G), edge-connectivity λ(G), vertex-connectivity κ(G), and let Ḡ be the complement of G. In this article we prove that either λ(G)=δ(G) or λ(Ḡ)=δ(Ḡ). In addition, we present the Nordhaus–Gaddum type result κ(G)+κ(Ḡ)≥min{δ(G),δ(Ḡ)}+1. A family of examples will show that this inequality is best possible.