On automorphisms of a distance-regular graph with intersection array $\{204,175,48,1;1,12,175,204\}$
Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 22 (2016) no. 1, pp. 212-219
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A distance-regular graph $\Gamma$ with intersection array $\{204,175,48,1;1,12,175,204\}$ is an $AT4$-graph. The antipodal quotient $\bar \Gamma$ has parameters $(800,204,28,60)$. Automorphisms of the specified graphs are found. In particular, neither of the two graphs is edge-symmetric.
Keywords:
strongly regular graph, eigenvalue of a graph, automorphism of a graph.
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title = {On automorphisms of a distance-regular graph with intersection array $\{204,175,48,1;1,12,175,204\}$},
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A. A. Makhnev; M. S. Nirova; D. V. Paduchikh. On automorphisms of a distance-regular graph with intersection array $\{204,175,48,1;1,12,175,204\}$. Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 22 (2016) no. 1, pp. 212-219. http://geodesic.mathdoc.fr/item/TIMM_2016_22_1_a18/