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We discuss equivariance for linear liftings of measurable functions. Existence is established when a transformation group acts amenably, as e.g. the Mobius group of the projective line. Since the general proof is very simple but not explicit, we also provide a much more explicit lifting for semisimple Lie groups acting on their Furstenberg boundary, using unrestricted Fatou convergence. This setting is relevant to L-infinity-cocycles for characteristic classes.
Type
research article
Web of Science ID
WOS:000356043500002
Author(s)
Date Issued
2015
Published in
Volume
230
Issue
2
Start page
149
End page
165
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
September 28, 2015
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