RUS  ENG
Full version
JOURNALS // Journal of Siberian Federal University. Mathematics & Physics // Archive

J. Sib. Fed. Univ. Math. Phys., 2022 Volume 15, Issue 3, Pages 378–384 (Mi jsfu1005)

This article is cited in 1 paper

Dihedral group of order $8$ in an autotopism group of a semifield projective plane of odd order

Olga V. Kravtsova

Siberian Federal University, Krasnoyarsk, Russian Federation

Abstract: We investigate the well-known hypothesis of D. R. Hughes that the full collineation group of a non-Desarguesian semifield projective plane of a finite order is solvable (the question 11.76 in Kourovka notebook was written down by N. D. Podufalov). The spread set method allows us to prove that any non-Desarguesian semifield plane of order $p^N$, where $p\equiv 1\pmod 4$ is prime, does not admit an autotopism subgroup isomorphic to the dihedral group of order $8$. As a corollary, we obtain the extensive list of simple non-Abelian groups which cannot be the autotopism subgroups.

Keywords: semifield plane, spread set, Baer involution, homology, autotopism.

UDC: 519.145

Received: 10.01.2022
Received in revised form: 14.02.2022
Accepted: 01.04.2022

Language: English

DOI: 10.17516/1997-1397-2022-15-3-378-384



© Steklov Math. Inst. of RAS, 2025