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math.CO2022
On symmetric 2-(70,24,8) designs with an automorphism of order 6
Sanja Rukavina, Vladimir D. Tonchev
In this paper we analyze possible actions of an automorphism of order six on a - design, and give a complete classification for the action of the cyclic automorphis…
math.CO2022
Extremal ternary self-dual codes of length 36 and symmetric 2-(36,15,6) designs with an automorphism of order 2
Sanja Rukavina, Vladimir D. Tonchev
In this note we report the classification of all symmetric 2-(36,15,6) designs that admit an automorphism of order 2 and their incidence matrices generate an extremal ternary self-…