Generalized KMT conjecture for Delaunay circle patterns

Let SS be a closed, oriented surface of genus at least 22. An admissible weighted graph (Γ,θ)(\Gamma,\theta) in SS is a graph embedded in SS that is the 1-skeleton of a cell decomposition, with θ:E(Γ)(0,π)\theta:E(\Gamma)\to(0,\pi) such that the sum of the edge weights around every face is 2π2\pi, while the sum around every contractible cycle not contained in the boundary of a face is strictly greater than 2π2\pi. Let CΓ,θ\mathcal C_{\Gamma,\theta} be the space of pairs (σ,C)(\sigma,\mathcal C) consisting of a complex projective structure σ\sigma on SS and a circle pattern C\mathcal C with nerve Γ\Gamma and intersection angles θ\theta. Generalized KMT conjecture. For every admissible weighted graph (Γ,θ)(\Gamma,\theta), the forgetful map

CΓ,θTS\mathcal C_{\Gamma,\theta}\to\mathcal T_S

is a homeomorphism. This generalizes the circle-packing statement to Delaunay circle patterns with prescribed intersection angles. The conjecture has been proved for tori by Wayne Lam; the supplied source does not assert a result for the stated genus-at-least-two setting.

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Primary source

Jean-Marc Schlenker, “Projective rigidity of circle patterns and polyhedral surfaces in hyperbolic ends”, arXiv:2508.15339 (2025).

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