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MOC
1998
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13 years 10 months ago
Steiner systems S(5, 6, v) with v = 72 and 84
It is proved that there are precisely 4204 pairwise non-isomorphic Steiner systems S(5, 6, 72) invariant under the group PSL2(71) and which can be constructed using only short orbi...
Mike J. Grannell, Terry S. Griggs, Rudolf Mathon