Perelman's bi-Lipschitz stability conjecture for Alexandrov spaces

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Let

Xin→GHXnX_i^n\stackrel{\mathrm{GH}}{\to}X^n

be a non-collapsed Gromov–Hausdorff-convergent sequence of compact Alexandrov spaces of dimension nn with curvature bounded below by −1-1. Perelman's bi-Lipschitz stability conjecture. There exists C>1C>1 such that, for every sufficiently large ii, XinX_i^n is CC-bi-Lipschitz equivalent to XnX^n. The compactness of the limit implies that the diameters of the XinX_i^n are uniformly bounded. This is a stability question for Alexandrov spaces under non-collapsed Gromov–Hausdorff convergence; the supplied text gives no resolution.

References

Primary source

Shouhei Honda and Andrea Mondino, “Gap phenomena under curvature restrictions”, arXiv:2410.04985 (2025).

Additional references

2 papers in this index state this conjecture (2015–2024). The statement above is taken from the most recent of them; the others are arXiv:1507.08211.

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