Equidistribution conjecture for stationary geodesic nets

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Let MM be a closed manifold, let gg be a Riemannian metric on MM, and let γi:Γi→M\gamma_i:\Gamma_i\rightarrow M be stationary geodesic nets. A sequence of such nets is equidistributed in MM if their length-weighted integrals converge to the normalized Riemannian volume integral. Equidistribution conjecture. For a generic set of metrics, every metric gg in that set admits a sequence {γi:Γi→M}\{\gamma_i:\Gamma_i\rightarrow M\} of stationary geodesic nets in (M,g)(M,g) such that, for every C∞C^{\infty} function f:M→Rf:M\rightarrow\mathbb{R},

lim⁡k→∞∑i=1k∫γif dL⁡g∑i=1kL⁡g(γi)=∫Mf dVol⁡gVol⁡(M,g).\lim_{k\rightarrow\infty}\frac{\sum_{i=1}^k\int_{\gamma_i}f\,\operatorname{dL}_g}{\sum_{i=1}^k\operatorname{L}_g(\gamma_i)}=\frac{\int_M f\,\operatorname{dVol}_g}{\operatorname{Vol}(M,g)}.

This is an open problem in general; the cases n=2n=2 and n=3n=3 were stated in the source to be solved, with the two-dimensional case established for closed geodesics and generic metrics.

References

Primary source

Yevgeny Liokumovich and Bruno Staffa, “Generic density of geodesic nets”, arXiv:2107.12340 (2023).

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