Center not is intermediately characteristic

From Groupprops
Jump to: navigation, search
This article gives the statement, and possibly proof, of the fact that for a group, the subgroup obtained by applying a given subgroup-defining function (i.e., center) does not always satisfy a particular subgroup property (i.e., intermediately characteristic subgroup)
View subgroup property satisfactions for subgroup-defining functions | View subgroup property dissatisfactions for subgroup-defining functions


The center of a group need not be characteristic in every intermediate subgroup.


Example of the dihedral group

In the dihedral group of order eight, generated by a rotation a and reflection x, the center \{ e, a^2 \} is not intermediately characteristic. In fact, it is not characteristic in the intermediate subgroup \{ e,a^2,x,a^2x \}.