[GAP Forum] bug with units of quaternion algebras

[Laurent Bartholdi]

hi,
i don't know where the problem is, here:

gap> u := Units(QuaternionAlgebra(Integers mod 3));
<group with 4 generators>
gap> Size(u);
48
gap> Size(Centre(u));
2
gap> Size(u/Centre(u));
48

--
Laurent Bartholdi          \  laurent.bartholdi<at>gmail<dot>com
EPFL SB SMA IMB MAD   \    Téléphone: +41 21-6930380
CH-1015 Lausanne, Switzerland \      Fax: +41 21-6930385