On Friday, October 2, 2015 at 5:02:43 AM UTC-7, vdelecroix wrote: > > important ingredient: there is no normal form in general! This is an > undecidable problem... there is no algorithm that takes as input a > presentation and outputs whether this group has more than one element. > > Though, there are some results about specific presentations (e.g. only > one relation, small simplifications, etc). >
And, as far as Sage is concerned, we can easily do as well as gap for gap objects: http://trac.sagemath.org/ticket/19016#comment:21 -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
