Halin graphs are 3-vertex-colorable except even wheels

7 Mar 2019A. KapanowskiA. Krawczyk

A Halin graph is a graph obtained by embedding a tree having no nodes of degree two in the plane, and then adding a cycle to join the leaves of the tree in such a way that the resulting graph is planar. According to the four color theorem, Halin graphs are 4-vertex-colorable... (read more)

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