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Three new distance-regular graphs. (English) Zbl 0794.05135
We describe three new diameter 4 distance-regular triple covers of strongly regular graphs. The first two such covers are distance- transitive, with intersection arrays {416,315,64,1;1,32,315,416} and {56,45,16,1;1,8,45,56}. The third has intersection array {32,27,8,1;1,4,27,32}, but is not distance-transitive.

MSC:
05E30 Association schemes, strongly regular graphs
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