Hoffman-Singleton Theorem

Author

Eric W. Weisstein
January 28, 2009

This notebook downloaded from http://mathworld.wolfram.com/notebooks/GraphTheory/Hoffman-SingletonTheorem.nb.

For more information, see Eric's MathWorld entry http://mathworld.wolfram.com/Hoffman-SingletonTheorem.html.

©2009 Wolfram Research, Inc. except for portions noted otherwise

Cases

Select[GraphData["Regular"],GraphData[#,"Girth"]==5&&GraphData[#,"Diameter"]==2&]

Sort[Union[GraphData[#,"Degrees"]]&/@%//Flatten]