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arxiv: 1610.01113 · v3 · pith:XLGHIFOXnew · submitted 2016-10-04 · 🧮 math.CO

Random 4-regular graphs have 3-star decompositions asymptotically almost surely

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keywords regularalmostasymptoticallygraphrandomstarsurelyafterward
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In 2006, Barat and Thomassen conjectured in 2006 that the edges of every planar 4-regular 4-edge-connected graph can be decomposed into copies of the star with 3 leaves. Shortly afterward, Lai constructed a counterexample to this conjecture. Using the small subgraph conditioning method of Robinson and Wormald, we prove that a random 4-regular graph has an $S_3$-decomposition asymptotically almost surely, provided the number of vertices is divisible by 3.

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