Openness and closedness conjecture for Θ-positive Anosov representations

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Let Σ\Sigma be a closed oriented surface and let (G,PΘR)(\mathrm{G},\mathrm{P}^\mathbb{R}_\Theta) admit a Θ\Theta-positive structure. A representation ρ:π1Σ→GR\rho:\pi_1\Sigma\to\mathrm{G}^\mathbb{R} is Θ\Theta-positive Anosov when it is PΘR\mathrm{P}^\mathbb{R}_\Theta-Anosov and its Anosov boundary curve sends positively ordered triples in ∂∞π1Σ\partial_\infty\pi_1\Sigma to positive triples in GR/PΘR\mathrm{G}^\mathbb{R}/\mathrm{P}^\mathbb{R}_\Theta. Openness and closedness conjecture. The set of Θ\Theta-positive Anosov representations is an open and closed subset of X(Σ,GR){\mathcal X}(\Sigma,\mathrm{G}^\mathbb{R}). This asserts that positivity defines a union of connected components of the character variety, a foundational property for the higher Teichmüller spaces considered in the paper. The source provides no resolution evidence, so the conjecture is recorded as open.

References

Primary source

Steve Bradlow, Brian Collier, Oscar Garcia-Prada, Peter Gothen and André Oliveira, “A general Cayley correspondence and higher Teichmüller spaces”, arXiv:2101.09377 (2024).

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