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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