Author

Zhiqi Shen

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Preprint Aug 2026

ARC: Augmented-Rank Conformalization for Changepoint Localization --- Finite-Sample Validity and Distribution-Robust Efficiency

This work proposes ARC (Augmented-Rank Conformalization), a family of scores depending on the data only through within-segment ranks: rank-CUSUM location and scale channels, their fixed combinations, and a lightweight neural score frozen after synthetic training, which is an efficiency transfer theorem.

Chen-Chen Peng, Mi-Xia Wu, Qi-Jing Yan et al. · 1 citation

Preprint Aug 2026

ARM: Detector-Agnostic Changepoint Attribution with Finite-Sample Error Control

ARM (Attribution by Rank Maxima), a wrapper that accepts a changepoint located by an arbitrary detector and returns the set of coordinates certified to have changed, each carrying a location or scale type label, is proposed.

Chen-Chen Peng, Mi-Xia Wu, Qi-Jing Yan et al. · 0 citations