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Steiner systems
Authors:M. J. Grannell   T. S. Griggs   R. A. Mathon.
Affiliation:Department of Mathematics and Statistics, University of Central Lancashire, Preston PR1 2HE, United Kingdom

T. S. Griggs ; Department of Mathematics and Statistics, University of Central Lancashire, Preston PR1 2HE, United Kingdom

R. A. Mathon ; Department of Computer Science, University of Toronto, Toronto, Ontario, Canada M5S 1A4

Abstract:It is proved that there are precisely 4204 pairwise non-isomorphic Steiner systems $S(5,6,72)$ invariant under the group $mathrm{PSL}_2(71)$ and which can be constructed using only short orbits.

It is further proved that there are precisely 38717 pairwise non-isomorphic Steiner systems $S(5,6,84)$ invariant under the group $mathrm{PSL}_2(83)$ and which can be constructed using only short orbits.

Keywords:
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