Guichard-Labourie-Wienhard conjecture on positive representations

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Let Σg\Sigma_g be a closed surface of genus gg, let GG admit a Θ\Theta-positive structure, and let PΘ<GP_\Theta<G be the associated parabolic subgroup. A representation ρ:π1(Σg)→G\rho:\pi_1(\Sigma_g)\to G is Θ\Theta-positive if there exists a continuous ρ\rho-equivariant map

ξ:S1→G/PΘ\xi:S^1\to G/P_\Theta

which sends positive triples in S1S^1 to positive triples in G/PΘG/P_\Theta. The ambient quotient is Hom⁡(π1(S),G)/G\operatorname{Hom}(\pi_1(S),G)/G.

Guichard-Labourie-Wienhard conjecture. The set of Θ\Theta-positive representations ρ:π1(Σg)→G\rho:\pi_1(\Sigma_g)\to G is open and closed in Hom⁡(π1(S),G)/G\operatorname{Hom}(\pi_1(S),G)/G. In particular, Θ\Theta-positive representations form higher Teichmüller spaces.

The conjecture would produce higher Teichmüller spaces for all simple Lie groups admitting a Θ\Theta-positive structure. The source lists the relevant families of groups and does not state that the conjecture is resolved.

References

Primary source

Anna Wienhard, “An invitation to higher Teichmüller theory”, arXiv:1803.06870 (2018).

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