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Fréchet Means for Distributions of Persistence diagrams

2012/06/13 by Turner, Katharine, Mileyko, Yuriy, Mukherjee, Sayan +1 · 11 citations
#51 #62 #FOS: Mathematics #General Topology (math.GN) #Metric Geometry (math.MG) #Statistics Theory (math.ST)

paper · doi:10.48550/arxiv.1206.2790

Abstract

Given a distribution ρ on persistence diagrams and observations X1,...Xn \stackreliid∼ ρ we introduce an algorithm in this paper that estimates a Fréchet mean from the set of diagrams X1,...Xn. If the underlying measure ρ is a combination of Dirac masses ρ= (1)/(m) ∑i=1m δZi then we prove the algorithm converges to a local minimum and a law of large numbers result for a Fréchet mean computed by the algorithm given observations drawn iid from ρ. We illustrate the convergence of an empirical mean computed by the algorithm to a population mean by simulations from Gaussian random fields.

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