[GAP Forum] ClosureGroup!

[Stephen Linton]

Dear Lopo Apelo Kosho,



> On 12 Oct 2019, at 13:17, lopo apelo kosho <helo_07 at yahoo.com> wrote:
> 
> Dear friends, 
> I am writing a GAP code to check the following property: The join of any two permutable subgroup is a PERMUTABLE subgroup. I have a code that gives all permutable subgroups in a given group (PermutableSubgroups(g)). Here is my code:
> 

I think the problem is here:

> 
> for i in[1..Size(n)] do 
> 
> for j in [i+1..n]do
> 

The second loop seems to assume that n is a number, but it is in fact a list of subgroups. Maybe that should be Size(n)?

	Steve