English

The Cayley isomorphism property for the group $C^5_2\times C_p$

Combinatorics 2020-12-29 v1 Group Theory

Abstract

A finite group GG is called a DCI-group if two Cayley digraphs over GG are isomorphic if and only if their connection sets are conjugate by a group automorphism. We prove that the group C25×CpC_2^5\times C_p, where pp is a prime, is a DCI-group if and only if p2p\neq 2. Together with the previously obtained results, this implies that a group GG of order 32p32p, where pp is a prime, is a DCI-group if and only if p2p\neq 2 and GC25×CpG\cong C_2^5\times C_p.

Keywords

Cite

@article{arxiv.2005.14539,
  title  = {The Cayley isomorphism property for the group $C^5_2\times C_p$},
  author = {Grigory Ryabov},
  journal= {arXiv preprint arXiv:2005.14539},
  year   = {2020}
}

Comments

19 pages. arXiv admin note: text overlap with arXiv:2003.08118, arXiv:1912.08835