Gromov's (α,β,λ)(\alpha,\beta,\lambda)-convergence conjecture for scalar curvature

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Let XX and XiX_i be closed oriented Riemannian manifolds, and let Wαi,βi,λi ⁣:XiXW_{\alpha_i,\beta_i,\lambda_i}\colon X_i\to X denote Riemannian (αi,βi,λi)(\alpha_i,\beta_i,\lambda_i)-cobordisms, meaning (αi,βi)(\alpha_i,\beta_i)-cobordisms equipped with a λi\lambda_i-Lipschitz retraction onto XX. Assume there is a sequence of such cobordisms with βi0\beta_i\to 0 and λi1\lambda_i\to 1. Gromov's (α,β,λ)(\alpha,\beta,\lambda)-convergence conjecture. If each XiX_i has non-negative scalar curvature, then so does XX. This asks whether non-negative scalar curvature is preserved under a cobordism-based convergence with controlled volume and retractions; its resolution is not specified in the source.

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Primary source

Liam Mazurowski and Xuan Yao, “Scalar curvature under weak limits of manifolds”, arXiv:2605.03136 (2026).

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