Naber's curvature-measure convergence conjecture

From papers

Let (Mi,gi)(M_i,g_i) be a sequence of nn-dimensional manifolds with lower Ricci or sectional curvature bounds, and suppose that MiM_i Gromov–Hausdorff converge without collapsing to XX. Naber's curvature-measure convergence conjecture. As measures,

scalidvolgiRdHn+ΦdHn1+θdHn2,scal_i \,\operatorname d {vol}_{g_i}\to {\operatorname R}\,\operatorname d\mathcal{H}^n+\Phi\,\operatorname d\mathcal{H}^{n-1}+\theta\,\operatorname d\mathcal{H}^{n-2},

where R{\operatorname R}, Φ\Phi, and θ\theta are locally L1L^1 with respect to Hn\mathcal{H}^n, Hn1\mathcal{H}^{n-1}, and Hn2\mathcal{H}^{n-2}, respectively; Φ\Phi is supported on an (n1)(n-1)-rectifiable subset; and θ(x)=θn2(x)\theta(x)=\theta_{n-2}(x) is supported on the top stratum of the (n2)(n-2)-rectifiable singular set S(X)=Sn2(X)\mathcal{S}(X)=\mathcal{S}^{n-2}(X). The conjecture seeks a curvature-measure decomposition for nonsmooth Gromov–Hausdorff limits. The source notes partial results for lower sectional-curvature bounds, but leaves the general formulation open.

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Sources & referencesView supporting material

Primary source

Nan Li, “Quantitative estimates on the C^2-singular sets in Alexandrov spaces”, arXiv:2306.03382 (2023).

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