Abstract:
We find possible orders and fixed point subgraphs of a hypothetical distance-regular graph with intersection array $\{99,84,1;1,12,99\}$. It is shown that, if $\Gamma$ is a vertex-symmetric graph with intersection array $\{99,84,1;1, 12,99\}$, then its automorphism group is a $\{2,3,5\}$-group.
Keywords:distance-regular graph, automorphism of a graph.