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The VC-dimension and point configurations in ℝd

2025/10/15 by Iosevich, Alex, Magyar, Akos, McDonald, Alex +1
#28A78 #28A80 #42B10 #Classical Analysis and ODEs (math.CA) #FOS: Mathematics

paper · doi:10.48550/arxiv.2510.13984

Abstract

Given a set X and a collection \mathcal H of functions from X to \0,1\, the VC-dimension measures the complexity of the hypothesis class H in the context of PAC learning. In recent years, this has been connected to geometric configuration problems in vector spaces over finite fields. In particular, it is easy to show that the VC-dimension of the set of spheres of a given radius in \mathbbFqd is equal to d+1, since this is how many points generically determine a sphere. It is known that for E⊆ \mathbbFqd, |E|≥ qd-(1)/(d-1), the set of spheres centered at points in E, and intersected with the set E, has VC-dimension either d or d+1. In this paper, we study a similar question over Euclidean space. We find an explicit dimensional threshold sd

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