Factorization conjecture for quasi-isometries through collapsing maps
Factorization conjecture for quasi-isometries through collapsing maps
Let and be metric spaces, and let a quasi-isometry mean a map satisfying the usual multiplicative and additive coarse bounds. A collapsing map is a map obtained by collapsing a subset via an equivalence relation, and a Lipschitz map is a map with a linear distance bound.
Factorization conjecture. Any quasi-isometry can be expressed as the composition of a collapsing map and Lipschitz map.
This conjecture proposes that quasi-isometries, including canonical examples such as the floor function, admit a factorization into elementary collapsing and Lipschitz operations. The source gives no resolution or further hypotheses.
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Sources & referencesView supporting material
Primary source
Josh Thompson and Davin Hemmila, “Collapsing Maps and Quasi-Isometries”, arXiv:2202.05915 (2022).
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