Surface group representations with maximal Toledo invariant

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Surface Group Representations with Maximal Toledo Invariant

We develop the theory of maximal representations of the fundamental group π1(Σ) of a compact connected oriented surface Σ with boundary ∂Σ, into the isometry group of a Hermitian symmetric space X or, more generally, a group of Hermitian type G. For any homomorphism ρ : π1(Σ) → G, we define the Toledo invariant T(Σ, ρ), a numerical invariant which is in general not a characteristic number, but ...

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ژورنال

عنوان ژورنال: Annals of Mathematics

سال: 2010

ISSN: 0003-486X

DOI: 10.4007/annals.2010.172.517