Subsets of rectifiable curves in Hilbert space-the analyst’s TSP

By Raanan Schul. 2006

91 citations recorded by the source corpus.

We study one dimensional sets (Hausdorff dimension) lying in a Hilbert space. The aim is to classify subsets of Hilbert spaces that are contained in a connected set of finite Hausdorff length. We do so by extending and improving results of Peter Jones and Kate Okikiolu for sets in ℝd. Their results formed the basis of quantitative rectifiability in ℝd. We prove a quantitative version of the following statement: a connected set of finite Hausdorff length (or a subset of one), is characterized by the fact that inside balls at most scales aroundmost points of the set, the set lies close to a straight line segment (which depends on the ball). This is done via a quantity, similar to the one introduced in [Jon90], which is a geometric analogue of the Square function. This allows us to conclude that for a given set K, the ℓ2 norm of this quantity (which is a function of K) has size comparable to a shortest (Hausdorff length) connected set containing K. In particular, our results imply that, with a correct reformulation of the theorems, the estimates in [Jon90, Oki92] are independent of the ambient dimension.

Subfields: Applied Mathematics, Geometry and Topology

View Paper: https://www.semanticscholar.org/paper/21a4e3521a34d417e65d7368a1699378a35f59a4

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In Applied Mathematics

1. Jonas Azzam
2. Raanan Schul
3. Xavier Tolsa

In Geometry and Topology

1. Jonas Azzam
2. Raanan Schul
3. Xavier Tolsa

Citations in the corpus

• An analyst’s traveling salesman theorem for sets of dimension larger than one (2016, background): “1 holds for E in an infinite dimensional Hilbert spaces [33], but that requires switching from to a multi-resolution of balls centered on E .”