Abstract:
An automorphism group G of a cyclically ordered set ⟨X,C⟩ is said to be c-3-transitive if for any elements xi,yi∈X (i=1,2,3), such that C(x1,x2,x3) and C(y1,y2,y3) there exists an element g∈G satisfying g(xi)=yi, i=1,2,3. We prove that if an automorphism group of a cyclically ordered set is c-3-transitive, then it is simple. A description of c-3-transitive automorphism groups with Abelian two-point stabilizer is given.