Glasnik Matematicki, Vol. 34, No.2 (1999), 129-145.

ENUMERATION OF SYMMETRIC (69,17,4) DESIGNS ADMITTING Z6 AS AN AUTOMORPHISM GROUP

Sanja Rukavina

Department of Mathematics, Faculty of Philosophy in Rijeka, Omladinska 14, 51000 Rijeka, Croatia
e-mail: sanjar@mapef.pefri.hr


Abstract.   All symmetric (69,17,4) designs admitting the cyclic group of order 6 as an automorphism group are classified and their full automorphism groups are determined.

1991 Mathematics Subject Classification.   05B05.

Key words and phrases.   Symmetric design, automorphism group, orbit structure.


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