Bianchi group
From Wikipedia, the free encyclopedia
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For the 3-dimensional Lie groups or Lie algebras, see Bianchi classification.
In mathematics, a Bianchi group is a group of the form
- PSL2(Od)
where d is a positive square-free integer. Here, PSL denotes the projective special linear group and Od is the ring of integers of the imaginary quadratic field Q(√−d).
The groups were first studied by Luigi Bianchi in the 1890s as a natural class of discrete subgroups of PSL2(C).
[edit] References
- B.Fine, "Bianchi group" SpringerLink Encyclopaedia of Mathematics (2001)
