Glasnik matematički, Vol. 40 No. 1, 2005.
Original scientific paper
Biplanes (56,11,2) with a fixed-point-free involutory automorphism
Mario Essert
Ljubo Marangunić
Abstract
The aim of this article is to prove that exactly four biplanes with parameters (56,11,2) admit a fixed-point-free action of an involutory automorphism. These are: Hall's biplane B20, Salwach and Mezzaroba's biplane B22, Denniston's biplane B24 and Denniston's biplane B26.
Keywords
Biplane; design; automorphism group; orbit; orbit structure
Hrčak ID:
392
URI
Publication date:
21.5.2005.
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