Abstract:
Let GG be a permutation group acting transitively on a finite set ΩΩ. We classify all such (G,Ω)(G,Ω) when GG contains a single conjugacy class of derangements. This was done under the assumption that GG acts primitively by Burness and Tong-Viet. It turns out that there are no imprimitive examples. We also discuss some results on the proportion of conjugacy classes which consist of derangements.
Citation:
Robert M. Guralnick, “Conjugacy classes of derangements in finite transitive groups”, Algebra, geometry, and number theory, Collected papers. Dedicated to Academician Vladimir Petrovich Platonov on the occasion of his 75th birthday, Trudy Mat. Inst. Steklova, 292, MAIK Nauka/Interperiodica, Moscow, 2016, 118–123; Proc. Steklov Inst. Math., 292 (2016), 112–117