摘 要: | Allgraphsconsideredaresimpleandundirected.LetGbeagraphwithvertexsetV(G)andedgesetE(G).FOravertexuofG,thedegreeofuinGisdenotedbyd(u).NG(u)isthesetofthevenicesadjacellttouinG.WedenotethemaximumdegreeofGbyAandtheminimumdegreeby6respectively.WecallavertexvofGamajorvertexifd(v)=A,andaminorvertexifd(v)
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