This graph is the unique $\mathrm{SRG}(10,3,0,1)$. It is the complement of the Johnson graph $\mathrm{J}(5,2)$, and is the second subconstituent of the Clebsch graph. This graph has two distance-regular antipodal covers, namely the Desargues graph (its bipartite double) and the dodecahedron.
Number of vertices: | $10$ |
Diameter: | $2$ |
Intersection array: | $\{3,2;1,1\}$ |
Spectrum: | $3^1 1^5 (-2)^4$ |
Automorphism group: | $\mathrm{S}_5$ |
Distance-transitive: | Yes |
Primitive |