58 citations · 106 across the 12 of their papers we have counts for
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math.DG2005
Cocycle superrigidity and harmonic maps with infinite dimensional targets
David Fisher, Theron Hitchman
We announce a generalization of Zimmer's cocycle superrigidity theorem proven using harmonic map techniques. This allows us to generalize many results concerning higher rank lattic…
math.GR2005
Quasi-isometries and rigidity of solvable groups
Alex Eskin, David Fisher, Kevin Whyte
In this note, we announce the first results on quasi-isometric rigidity of non-nilpotent polycyclic groups. In particular, we prove that any group quasi-isometric to the three dime…
math.DS2005
Local Rigidity of group actions: Past, Present, Future
David Fisher
This survey aims to cover the motivation for and history of the study of local rigidity of group actions. There is a particularly detailed discussion of recent results, including o…