Glasnik Matematicki, Vol. 37, No.2 (2002), 259-268.
STEINER 2-DESIGNS S(2,4,28) WITH NONTRIVIAL
Department of Mathematics, University of Zagreb,
p.p. 335, 10002 Zagreb, Croatia
Abstract. In this article designs with parameters
S(2,4,28) and nontrivial automorphism groups are classified.
A total of 4466 designs were found.
Together with some S(2,4,28)'s with trivial
automorphism groups found by A.Betten, D.Betten and V.D.Tonchev
this sums up to 4653 nonisomorphic S(2,4,28) designs.
2000 Mathematics Subject Classification.
Key words and phrases. Block design, Steiner system,
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