Vietoris–Rips thickening self-reconstruction conjecture

Let XX be a metric space, potentially with additional assumptions, let r0r\geq 0, and let

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

Here VRm(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

VRm(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.

Sources & referencesView supporting material

Primary source

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

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