> < ^ Date: Tue, 10 Aug 1993 16:28:35 +0200
> < ^ From: Daniel Ruberman <ruberman@maths.ox.ac.uk >
> ^ Subject: SL_2

Dear Gap Forum--I was hoping to do some investigations concerning
SL_2 and PSL_2 of the ring of integers in Q(sqrt(p)). These groups are
finitely presented (I believe) but I haven't been able to find an explicit
presentation in the literature. Specific examples (e.g. p=5) would be of
interest as well as the general case.

Thank you,
Daniel Ruberman


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