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PSL2(R) ( $PS L_{2} (R)$ )

PSL2(R) is

S L_{2} (R) / {\pm I}

. It acts on the upper half-plane by the Möbius transformations

z ⟼ \frac{a z + b}{cz + d}

and is the group of orientation-preserving hyperbolic isometries.

 Ancestors (6)

 Incoming links (1)

Solution