[sage-devel] Re: [sage-combinat-devel] Canonical form for permutation groups

2013-04-11 Thread Volker Braun
On Thursday, April 11, 2013 2:49:10 AM UTC+1, Christian Stump wrote: > > In GAP one would just IdGroup() to get a unique label. > > Is this given for any finite group in GAP, or is this depending on > http://www.gap-system.org/Packages/sgl.html ? This depends on the small groups library. IdGro

[sage-devel] Re: [sage-combinat-devel] Canonical form for permutation groups

2013-04-10 Thread Christian Stump
> In GAP one would just IdGroup() to get a unique label. Is this given for any finite group in GAP, or is this depending on http://www.gap-system.org/Packages/sgl.html ? It looks like there is not much to do beyond these IdGroup in Sage since I guess they would have gone beyond n=22 in Gap otherwi

Re: [sage-devel] Re: [sage-combinat-devel] Canonical form for permutation groups

2013-04-10 Thread John Cremona
It may be relevant to look at the canonical labelling used for Galois grousp (see for example http://www.lmfdb.org/GaloisGroup/ and click on the word "label"). John On 10 April 2013 14:19, Nicolas M. Thiery wrote: > Hi Christian, > > On Wed, Apr 10, 2013 at 07:59:49AM -0500, Christian St

[sage-devel] Re: [sage-combinat-devel] Canonical form for permutation groups

2013-04-10 Thread Nicolas M. Thiery
Hi Christian, On Wed, Apr 10, 2013 at 07:59:49AM -0500, Christian Stump wrote: > I wonder if there is a way to get a canonical form of a subgroup of a > permutation group (or, even better, any group). This would be > something like a method "canonical_labeling" for permutation groups > tha