Boundary curvature-integral conjecture for Alexandrov spaces

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Let (X,dX)(X,d_X) be an nn-dimensional Alexandrov space with curvature bounded below by −1-1, and let p∈∂Xp\in\partial X. Suppose that

B2(p)∩∂X∖Sn−3(X)B_2(p)\cap\partial X\setminus\mathcal{S}^{n-3}(X)

is a smooth Riemannian manifold with metric g∂Xg_{\partial X} induced by dXd_X. Write scal∂Xscal_{\partial X} for its intrinsic scalar curvature.

Boundary curvature-integral conjecture. One has

∫B1(p)∩∂Xscal∂X d⁡volg∂X≤C(n).\int_{B_1(p)\cap\partial X} scal_{\partial X}\,\operatorname d {vol}_{g_{\partial X}}\le C(n).

The conjecture is motivated by the expected Alexandrov-space structure of the boundary and by examples showing that a global Alexandrov condition is necessary for such a bound; the source gives no resolution of this estimate.

References

Primary source

Nan Li, “Bounding Curvature Measure on Manifolds with Singularities”, arXiv:2606.08887 (2026).

Additional references

2 papers in this index state this conjecture (2012–2026). The statement above is taken from the most recent of them; the others are arXiv:1205.0323.

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