Incidence graphs of Hadamard $(19,9,4)$-design

Number of vertices:$38$
Diameter:$3$
Intersection array:$\{9,8,5;1,4,9\}$
Spectrum:$9^1 (\sqrt{5})^{18} (-\sqrt{5})^{18} (-9)^1$
Distance-transitive:No
Bipartite




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Last updated: 1 February 2017