The Gruenberg-Kegel graph of finite solvable groups that are character-quadratic or semi-rational

Irene Crispi, Sara C. Debón, Emanuele Pacifici +2

A finite group $G$ is said to be semi-rational if the set of generators of each cyclic subgroup of $G$ is contained in at most two $G$-conjugacy classes. This is equivalent to the…