Density conjecture for pleated surfaces in the complex character variety

About 1 year old · traced to

Let SS be a closed surface with fundamental group Γ\Gamma, let d≥2d\geq 2, and let λ\lambda be a maximal geodesic lamination on SS. Denote by R(λ,d)\mathfrak R(\lambda,d) the space of conjugacy classes of dd-pleated surfaces with pleating locus λ\lambda, and by X(Γ,PGL⁡d(C⁡))\mathfrak X(\Gamma,\operatorname{\mathsf{PGL}}_d(\operatorname{\mathbb{C}})) the character variety of representations of Γ\Gamma into PGL⁡d(C⁡)\operatorname{\mathsf{PGL}}_d(\operatorname{\mathbb{C}}). Density conjecture. For every maximal geodesic lamination λ\lambda, the space R(λ,d)\mathfrak R(\lambda,d) is dense in

X(Γ,PGL⁡d(C⁡)).\mathfrak X(\Gamma,\operatorname{\mathsf{PGL}}_d(\operatorname{\mathbb{C}})).

Equivalently, every representation from Γ\Gamma to PGL⁡d(C⁡)\operatorname{\mathsf{PGL}}_d(\operatorname{\mathbb{C}}) can be approximated arbitrarily well by generalized bending deformations along λ\lambda of Hitchin representations. The preceding results show that these deformations meet every connected component of the character variety, but density within each component remains open.

References

Primary source

Sara Maloni, Giuseppe Martone, Filippo Mazzoli and Tengren Zhang, “Topology of the space of d-pleated surfaces”, arXiv:2508.04813 (2025).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.