The converse Alexandrov-to-distributional sectional curvature conjecture for C1C^1 metrics

From papers

Let (M,g)(M,g)) be a Riemannian manifold with gcinC1gcin C^1 such that (M,dg)(M,d_g) is an Alexandrov space with curvature bounded from below (respectively, above) by kcincmathbbRk cin cmathbb{R}. Distributional sectional curvature is the curvature notion defined by distributional inequalities for the curvature tensor of a low-regularity metric.

Converse curvature conjecture. The distributional sectional curvature of (M,g)(M,g) is bounded from below (respectively, above) by kk.

This conjecture asks for a converse to the paper's result that, for C1C^1 metrics, distributional sectional-curvature bounds imply the corresponding Alexandrov curvature bounds. Its status is not established in the supplied text.

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Sources & referencesView supporting material

Primary source

Darius Erös, Michael Kunzinger, Argam Ohanyan and Alessio Vardabasso, “Distributional sectional curvature bounds for Riemannian metrics of low regularity”, arXiv:2503.17337 (2026).

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