Hadamard graph on 48 vertices $\cong$ Incidence graph of $\mathrm{STD}_6[12;2]$

Number of vertices:$48$
Diameter:$4$
Intersection array:$\{12,11,6,1;1,6,11,12\}$
Spectrum:$12^1 (\sqrt{12})^{12} 0^{22} (-\sqrt{12})^{12} (-12)^1$
Automorphism group:$(2.M_{12}):2$
Distance-transitive:Yes
Bipartite, Antipodal




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Last updated: 31 March 2019