Author

C. Karner

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Open access Sep 2026

From point sets to curves: 𝑡-Designs and Marcinkiewicz-Zygmund inequalities on the sphere

<p> A geodesic cycle is a closed curve that connects finitely many points along geodesics. We study geodesic cycles on the sphere in regard to their role in equal-weight quadrature via <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://w...

Martin Ehler, K. Gröchenig, C. Karner · Transactions of the American... · 0 citations

Jul 2026

Rethinking Clinical Relevance in Chest X-ray Machine Learning: How Evaluation References Define Performance

This work systematically investigates how evaluation-reference choices affect model performance and ranking in both pathology classification and image quality assessment (IQA), and shows that for supervised image classifiers, changing the label source leads to substantial differences not only in performance estimates b...

Panagiotis Fytas, Ian Selby, C. Karner et al. · arXiv.org · 0 citations