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| page = 6}}.</ref> It is not, however, the [[complement (set theory)|set complement]] of the graph; only the edges are complemented.
==Definition==
Let {{math|1=''G'' = (''V'', ''E'')}} be a [[simple graph]] and let {{mvar|K}} consist of all 2-element subsets of {{mvar|V}}. Then {{math|1=''H'' = (''V'', ''K'' \ ''E'')}} is the complement of {{mvar|G}}.<ref>{{Citation
| last=Diestel | first=Reinhard
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