[GAP Forum] Modular Group

[Alexander Konovalov]

Dear James,

I have a package Congruence which is still under development - I was waiting 
to GAP 4.5 to make its public release. It should be able to cover most, if 
not all subgroups from that preprint. 

Please see http://www.cs.st-andrews.ac.uk/~alexk/papers/Aachen06.pdf for my
slides about it. If you wish to get its development version, I may send you
an archive.

Best wishes,
Alexander


On 3 Aug 2012, at 12:31, James Read wrote:

> Dear Forum,
> 
> 
> How can one create the modular group and certain congruence subgroups of the modular group in GAP? In particular I am looking at the nine index 24 subgroups on page 22 here: http://arxiv.org/pdf/1201.3633v2.pdf.
> 
> 
> Many thanks,
> 
> 
> James Read
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--
Dr. Alexander Konovalov               School of Computer Science
& Centre for Interdisciplinary Research in Computational Algebra
University of St Andrews                 Tel +44/0 (1334) 461633
http://www.cs.st-andrews.ac.uk/~alexk    Fax +44/0 (1334) 463278
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