On positive and negative atoms of Cayley digraphs
By using a counterexample, the paper disproves Hamidoune's conjecture [\textit{Y. O. Hamidoune}, Sur la séparation dans les graphes de Cayley abéliens, Discrete Math. 55, 323-326 (1985; Zbl 0567.05027)] that a Cayley digraph always contains a positive atom.
scientific article; zbMATH DE number 4103097