From wikipedia:
"Every group character $\chi$ of the group $G$ induces an eigenvector of the adjacency matrix of $\mathcal{C}(G,S)$. The associated eigenvalue is $\sum_{s \in S} \chi (s)$."
It seems false to me. Is it not true only for abelian G?
2026-03-24 23:44:11.1774395851
Spectrum of the Cayley Graph
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