The size of graphs without nowhere-zero
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Hong-Jian Lai
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Article
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1995
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John Wiley and Sons
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English
โ 428 KB
๐ 1 views
Let G be a 2-edge-connected simple graph with order n. We show that if IV(G)l 5 17, then either G has a nowhere-zero 4-flow, or G is contractible to the Petersen graph. We also show that for n large, if Iโฌ(G)J L (' 2 17) + 34, then either G has a nonwhere-zero 4-flow, or G can be contracted to the P