Dear Benjamin, > On 2. Apr 2020, at 11:54, Benjamin Sambale <benjamin.samb...@gmail.com> wrote: > > Dear GAP people, > > I noticed the following unexpected behavior in GAP 4.11.0 (and some older > versions): > > G:=SmallGroup(2^9,261648);; > H:=Image(IsomorphismPermGroup(G)); > Size(Center(G)); #returns 4 > Size(Center(H)); #returns 8 > > The same happens if we convert into an fp group. Other groups of order 512 > and 1536 are affected as well. > I know very little about pc groups, but my guess is that the presentation of > G is somewhat inconsistent, although the problem does not occur in MAGMA.
Thank you very much for the report. That's of course a rather concerning issue. We have logged it at <https://github.com/gap-system/gap/issues/3940> and will look into this as soon as possible. Best regards Max _______________________________________________ Forum mailing list Forum@gap-system.org https://mail.gap-system.org/mailman/listinfo/forum
