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

Volume 8

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J. O. Button

Lifting Möbius Groups: Addendum

Published: December 26, 2002
Keywords: lift, group
Subject: 30F40, 20H10
Abstract
We show that if Γ is a group with H2(Γ; Z2)=0 then every representation of Γ into PSL(2,C) lifts to SL(2,C), but the converse does not hold.
Author information

Selwyn College, Cambridge, CB3 9DQ, U.K.
jb128@dpmms.cam.ac.uk
http://www.dpmms.cam.ac.uk/site2000/Staff/button01.html