This graph is the unique rank-3 strongly regular graph with parameters (176,40,12,8). This graph is the complement of the NU5(2) graph. The local graph of this graph is the Sp4(3) graph, a.k.a the ¯NU4(2) graph. This is the unique graph that is locally GQ(3,3).
| Number of vertices: | 176 |
| Diameter: | 2 |
| Intersection array: | {40,27;1,8} |
| Spectrum: | 401855(−4)120 |
| Automorphism group: | PΓU(5,2)≅U(5,2):2 |
| Distance-transitive: | Yes |
| Primitive |