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math.DG2007
Local rigidity in quaternionic hyperbolic space
Inkang Kim, Pierre Pansu
In this note, we study deformations of quaternionic hyperbolic lattices in larger quaternionic hyperbolic spaces and prove local rigidity results. On the other hand, surface groups…
math.DG2002
Cartan Angular Invariant and Deformations in Rank One Symmetric Spaces
Boris Apanasov, Inkang Kim
We develop and study quaternionic and octonionic analogies of Cartan angular and Toledo invariants that are well known in the complex hyperbolic space. Using such invariants we stu…