Classification of cyclic groups underlying only smooth skew morphisms

Kan Hu, Istvan Kovacs, Young Soo Kwon

A skew morphism of a finite group $A$ is a permutation $\phi$ of $A$ fixing the identity element and for which there is an integer-valued function $\pi$ on $A$ such that $φ(ab)=φ(a)φ^{π…