The cross graph is the 6-vertex tree illustrated above.
It is implemented in the Wolfram Language as GraphData["CrossGraph"].
Cross Graph
See also
TreeExplore with Wolfram|Alpha
References
House of Graphs. "Cross Graph
." https://houseofgraphs.org/graphs/208.ISGCI:
Information System on Graph Class Inclusions v2.0. "List of Small Graphs."
https://www.graphclasses.org/smallgraphs.html.Referenced on Wolfram|Alpha
Cross GraphCite this as:
Weisstein, Eric W. "Cross Graph." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/CrossGraph.html