Let G be the permutation group of a finite set Ω.Consider S⊂G such that 1∈S and for any x,y∈Ω there exists a unique element σ∈S such that σ(x)=y.Prove that,if the elements of S∖{1} are conjugate in G,then G is 2−transitive on Ω group theorysuperior algebracollege contests