Vietoris–Rips thickening self-reconstruction conjecture

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Let XX be a metric space, potentially with additional assumptions, let r≥0r\geq 0, and let

M=VR⁡m(X;r).M=\operatorname{VR}^{\mathrm{m}}(X;r).

Here VR⁡m(X;r)\operatorname{VR}^{\mathrm{m}}(X;r) denotes the metric Vietoris–Rips thickening at scale rr. Vietoris–Rips thickening self-reconstruction conjecture. There exists ε>0\varepsilon>0 such that

VR⁡m(M;ε)≃M.\operatorname{VR}^{\mathrm{m}}(M;\varepsilon)\simeq M.

The conjecture proposes that a Vietoris–Rips metric thickening can be recovered, up to homotopy, by applying a sufficiently small-scale Vietoris–Rips thickening to itself. The source explicitly leaves open what additional assumptions on XX may be needed and gives no resolution.

References

Primary source

Henry Adams, Johnathan Bush and Joshua Mirth, “Operations on Metric Thickenings”, arXiv:2101.10489 (2021).

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