[GAP Forum] Subgroup stable under transposition

Dan Lanke dan_lanke at yahoo.com
Tue Oct 7 23:50:06 BST 2008

Dear Gap Forum,

Let A be a finite (abelian) group. How do I list all subgroups of A x A that are stable under the transposition (a,b) --> (b,a)? 

I know how to list all subgroup, but I don't know how to take care of the transposition condition.

Many thanks,


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