2 problems

Let $G_1$ and $G_2$ be finite CI-groups of coprime orders. Here a finite group is a CI-group if every Cayley graph over it has the CI-property. The coprime direct-product conjectur…

Let $G$ be a finite group and consider normal Cayley digraphs over $G$, meaning Cayley digraphs whose right-regular subgroup $G_r$ is normal in their automorphism group. A Cayley d…