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Cayley digraphs with normal adjacency matrices
- Source :
- Discrete Mathematics. 309:4343-4348
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- In this paper we give a criterion for the adjacency matrix of a Cayley digraph to be normal in terms of the Cayley subset S. It is shown with the use of this result that the adjacency matrix of every Cayley digraph on a finite group G is normal iff G is either abelian or has the form Q8×Z2n for some non-negative integer n, where Q8 is the quaternion group and Z2n is the abelian group of order 2n and exponent 2.
Details
- ISSN :
- 0012365X
- Volume :
- 309
- Database :
- OpenAIRE
- Journal :
- Discrete Mathematics
- Accession number :
- edsair.doi.dedup.....f740586faed709c3a8f638d51ccabac5