[GAP Forum] Getting problem in structure description of a subgroup

[Alexander Konovalov]

Dear Harsha,

On 23 Nov 2014, at 10:41, Harsha Arora <harshaarora.2008 at gmail.com> wrote:

> Dear Sir
> 
> I have written code to get autocenter of a group , that is collection of
> all those elements in G which are fixed by all automorphisms of G, like
> center of G as centeral elements are fixed by all inner automorphisms of G
> . I have got the output. But i m not getting the structure description of
> the subgroup.

It's hard to answer this without seeing the exact calculation. Is it the 
case that you are trying to call 'StructureDescription' on a list of elements
and not on a group they generate?

> I am getting the message no method is installed. Can i get
> the code of how to find center of a group and derived subgroup of a group.

Yes - see 'Centre' and 'DerivedSubgroup'

HTH
Alexander