Séminaire Géométrie et groupes discrets
# Geodesic Currents, Positive Cross-Ratios and Degenerations of Maximal Representations

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Amphithéâtre Léon Motchane (IHES)
### Amphithéâtre Léon Motchane

#### IHES

Description

`Degenerations of maximal representations of a surface group may be seen as maximal representations in Sp(2n,F) for some non-Archimedean real closed field F. We associate to every such maximal representation a geodesic current whose intersection number is the length function of the representation for the L`^{1} norm. When the current is a measured lamination, we reconstruct an equivariant isometric embedding of the dual real tree in the Bruhat-Tits building of Sp(2n,F). This involves a general construction of an intersection current associated to a non necessarily continuous positive cross-ratio.

This is joint work with Marc Burger, Alessandra Iozzi, and Beatrice Pozzetti.

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