On the Codegree graphs of finite groups

Jiyong Chen, Ni Du, Leyi Li

The codegree of an irreducible character $\ddot{I}‡$ of a finite group $G$ is defined as $|G:\ker \ddot{I}‡|/\ddot{I}‡(1)$. The codegree graph $\hat{I}“(G)$ of a finite group $G$ is the graph whose vertices a…