Thanks, I thought about this, but I'm not sure how to pick central elements 
of order 2 in a group, or more precisely in a group that is given by 
gap("SmallGroup(n,i)"). I can try C= G.centre() and then get C.generators() 
but i'm not sure if I can assume anything about these generators (I doubt 
that they generate cyclic subgroups whose *direct* product is C).

Am I missing something easy?

Le lundi 14 janvier 2013 13:35:05 UTC+1, Volker Braun a écrit :
>
> Lame but easy method: Go though all groups with 2*G.Size() elements and 
> pick out the ones you want.
>

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