Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 246663

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 …
Clark Lyons's user avatar
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