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Questions on group theory which concern finite groups.

28 votes
6 answers
1k views

Are there always more conjugacy classes in the kernel of a morphism to $Z_2$ than not?

Let $G$ be a finite group and let $\phi:G\to Z_2$ be a homomorphism to the group with two elements. Is it always the case that there are more conjugacy classes in the kernel of $\phi$ than conjugacy c …
13 votes

Are there always more conjugacy classes in the kernel of a morphism to $Z_2$ than not?

I have a solution to the case of a general cyclic quotient which follows @‍diracdeltafunk's answer on MSE. If $A=Z_n$ is cyclic then we can treat $\phi:G\to Z_n\hookrightarrow\mathbb{C}$ as a one dime …
Clark Lyons's user avatar