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New York Journal of Mathematics 8 (2002), 257-258.

Lifting Möbius groups: Addendum

J. O. Button

Published: December 26, 2002
Keywords: lift, group
Subject: 30F40, 20H10


We show that if $\Gamma$ is a group with $H^2(\Gamma; \mathbb Z_2)=0$ then every representation of $\Gamma$ into $\pslc$ lifts to $\slc$, but the converse does not hold.

Author information:
Selwyn College, Cambridge, CB3 9DQ, U.K.