On isomorphisms of circulant digraphs of bounded degree

AbstractC.H. Li recently made the following conjecture: Let Γ be a circulant digraph of order n=n1n2 and degree m, where gcd(n1,n2)=1, n1 divides 4k, where k is odd and square-free, and every prime divisor of n2 is greater than m, or, if Γ is a circulant graph, every prime divisor of n2 is greater than 2m. Then Γ is a CI-digraph of Zn. In this paper we verify that this conjecture is true