Let G be a permutation group acting on a set V . A partition π of V is distinguishing if the only element of G that fixes each cell of π is the identity. The distinguishing number of G is the minimum number of cells in a distinguishing partition. We prove that if G is a primitive permutation group and |V | ≥ 336, its distinguishing number is two.

We give a complete characterization of finitely generated primitive groups in several settings including linear groups, subgroups of mapping class groups, groups acting minimally on trees and convergence groups. The latter category includes as a special case Kleinian groups as well as finitely generated subgroups of word hyperbolic groups. As an application we calculate the Frattini subgroup in...

Abstract In this paper, we propose a refinement of Sims’ conjecture concerning the cardinality point stabilizers in finite primitive groups, and make some progress towards refinement. process, when dealing with groups diagonal type, construct group ???? on ? two distinct points ?,?</m:mro...