Dear Lopo Apelo Kosho,
> On 12 Oct 2019, at 13:17, lopo apelo kosho <helo...@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
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