On Thu, Jun 28, 2012 at 8:27 AM, Jörn Steuding <steud...@mathematik.uni-wuerzburg.de> wrote: > Dear Prof. Stein, > > I have question concerning SAGE: when I try to compute the generators of > Gamma_0(3) (for example) and I use the command > > Gamma0(3).generators(algorithm="todd-coxeter") > > I receive > > Traceback (click to the left of this block for traceback) > ... > TypeError: generators() got an unexpected keyword argument 'algorithm'
You are probably using a really old version of Sage, since it works fine for me: sage: Gamma0(3).generators(algorithm="todd-coxeter") [ [1 1] [-1 0] [ 1 -1] [1 0] [1 1] [-1 0] [ 1 0] [0 1], [ 0 -1], [ 0 1], [3 1], [0 1], [ 3 -1], [-3 1] ] > > Unfortunately, for some congruence subgroups (I think Gamma_0(5)) the > routine 'generators' (without specification of the algorithm) does not > provide a complete list of generators. Really? This sounds like a major bug. What version of Sage are you using? What N doesn't work. Please use sage-support henceforth: https://groups.google.com/forum/?fromgroups#!forum/sage-support > > Can you please help me? > > Best, Joern. > > ____________ > > Prof. Dr. Joern Steuding > Department of Mathematics > Chair of Complex Analysis > University of Würzburg > Am Hubland > 97074 Würzburg > Germany > > Math building room 122 > phone: +49 (931) 888-5008 > fax: +49 (931) 888-5376 > e-mail: steud...@mathematik.uni-wuerzburg.de -- William Stein Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
