In this paper, we prove that the group Z (p) (n) is not a CI-group if n≥2p-1+( 2p-1 p), that is there exist two Cayley digraphs over Z(p)(n) which are isomorphic but their connection sets are not conjugate by an automorphism of Z(p)(n).
- Cayley graphs
- Schur rings
ASJC Scopus subject areas
- Theoretical Computer Science
- Discrete Mathematics and Combinatorics