Noncollapsed Ricci-curvature bi-Lipschitz embedding conjecture

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Let AA be a subset with diam⁡(A)≤D\operatorname{diam}(A)\leq D of an nn-dimensional complete Riemannian manifold (Mn,g)(M^n,g) with Ricci curvature

Ric⁡(g)≥−(n−1)g.\operatorname{Ric}(g)\geq -(n-1)g.

Assume that Vol⁡(B1(p))>v\operatorname{Vol}(B_1(p))>v for some p∈Ap\in A. Noncollapsed Ricci embedding conjecture. There is a bi-Lipschitz embedding

f ⁣:A→RNf\colon A\to\mathbb{R}^N

with distortion less than C(D,n,v)C(D,n,v) and image dimension N≤N(D,n,v)N\leq N(D,n,v). This weakens the lower sectional-curvature assumption to a lower Ricci-curvature bound while retaining a noncollapsing hypothesis; the source presents it as open.

References

Primary source

Sylvester Eriksson-Bique, “Quantitative Bi-Lipschitz embeddings of bounded curvature manifolds and orbifolds”, arXiv:1507.08211 (2017).

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