Author

A. T. Nguyen

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#machine learning Preprint Oct 2026

Valid for Free: Homophily-Gated Conformal Prediction for Training-Free Node Classification with Tabular Foundation Models

Tabular foundation models (TFMs) can classify the nodes of a graph without training on it, by reading node and neighborhood features as table rows next to labeled context rows. Work in this line reports predictive performance, not conformal coverage or prediction-set size. To our knowledge, we give the first reliabilit...

Long D. Nguyen, Hiển Minh Phùng, Viet Trong Nguyen et al. · 0 citations

#machine learning Preprint Sep 2026

How Many Categories Are Enough? Distribution-Free Certification Limits for Few-Shot Anomaly Thresholds

Few-shot anomaly detectors are judged by ranking metrics, yet deployment requires an alarm threshold with a controlled false-alarm rate (FAR). We ask how much normal evidence, in images or category units, is needed to certify such a threshold for an unseen category. Using a frozen DINOv2 principal component analysis (P...

G. Thai, A. T. Nguyen · 0 citations