DistanceRegular.org
Schläfli graph
Number of vertices:
$27$
Diameter:
$2$
Intersection array:
$\{16,5;1,8\}$
Spectrum:
$16^1 4^6 (-2)^{20}$
Automorphism group:
$\mathrm{PSp}(4,3):2$
Distance-transitive:
$\text{Yes}$
Primitive
$\text{Downloads}$
$\text{Adjacency matrix}$
$\text{Adjacency matrix in GAP format}$
$\text{Adjacency matrix in CSV format}$
$\text{Graph in GRAPE format}$
$\text{Links}$
$\text{Andries Brouwer}$
$\text{Wikipedia}$
$\text{Wolfram}$
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Graphs with diameter 2
Last updated: 14 August 2018