Journal of Applied Probability

# Limit theory for U-statistics under geometric and topological constraints with rare events

Publication Date Sep 14, 2022

## Abstract

Abstract We study the geometric and topological features of U-statistics of order k when the k-tuples satisfying geometric and topological constraints do not occur frequently. Using appropriate scaling, we establish the convergence of U-statistics in vague topology, while the structure of a non-degenerate limit measure is also revealed. Our general result shows various limit theorems for geometric and topological statistics, including persistent Betti numbers of Čech complexes, the volume of simplices, a functional of the Morse critical points, and values of the min-type distance function. The required vague convergence can be obtained as a result of the limit theorem for point processes induced by U-statistics. The latter convergence particularly occurs in the $\mathcal M_0$ -topology.

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Topological Constraints Volume Of Simplices Vague Convergence Geometric Constraints Theorems For Statistics Rare Events Non-degenerate Measure Geometric Statistics Values Of Function Geometric Features

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