Sormani's intrinsic-flat stability conjecture for almost nonnegative scalar curvature

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Let MjM_j be a sequence of Riemannian manifolds diffeomorphic to a 33-torus such that

vol⁡(Mj)=V0,diam⁡(Mj)≤D0,minA⁡(Mj)≥A0>0,\operatorname{vol}(M_j)=V_0,\qquad \operatorname{diam}(M_j)\leq D_0,\qquad \operatorname{minA}(M_j)\geq A_0>0,

where

minA⁡(Mj)=inf⁡{vol⁡(Σ):Σ is a closed minimal surface in Mj}.\operatorname{minA}(M_j)=\inf\{\operatorname{vol}(\Sigma):\Sigma\text{ is a closed minimal surface in }M_j\}.

If the scalar curvature R(Mj)R(M_j) satisfies R(Mj)≥−1jR(M_j)\geq -\frac{1}{j}, then Sormani's conjecture. There is a subsequence MjkM_{j_k} converging in intrinsic flat sense to a flat torus TT, and possibly vol⁡(Mjk)→vol⁡(T)\operatorname{vol}(M_{j_k})\to\operatorname{vol}(T). The conjecture refines scalar-curvature stability by imposing volume, diameter, and minimal-area noncollapsing bounds; the supplied text does not state that it has been resolved.

References

Primary source

Armando J. Cabrera Pacheco, Christian Ketterer and Raquel Perales, “Stability of graphical tori with almost nonnegative scalar curvature”, arXiv:1902.03458 (2020).

Additional references

2 papers in this index state this conjecture (2018–2019). The statement above is taken from the most recent of them; the others are arXiv:1804.04581.

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