$\text{Pappus graph} \cong \text{ Incidence graph of } AG(2,3) \text{ minus a parallel class}$

Number of vertices:$18$
Diameter:$4$
Intersection array:$\{3,2,2,1; 1,1,2,3\}$
Spectrum:$3^1 (\sqrt{3})^6 (0)^4 (-\sqrt{3})^6 (-3)^1$
Distance-transitive:$\text{Yes}$
Bipartite, Antipodal


Pappus graph

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Last updated: 4 February 2017