Archives AI News

Train on Validation (ToV): Fast data selection with applications to fine-tuning

arXiv:2510.00386v1 Announce Type: cross Abstract: State-of-the-art machine learning often follows a two-stage process: $(i)$~pre-training on large, general-purpose datasets; $(ii)$~fine-tuning on task-specific data. In fine-tuning, selecting training examples that closely reflect the target distribution is crucial. However, it is often the…

Lipschitz Bandits with Stochastic Delayed Feedback

arXiv:2510.00309v1 Announce Type: cross Abstract: The Lipschitz bandit problem extends stochastic bandits to a continuous action set defined over a metric space, where the expected reward function satisfies a Lipschitz condition. In this work, we introduce a new problem of…

Equivariant Geometric Scattering Networks via Vector Diffusion Wavelets

arXiv:2510.01022v1 Announce Type: cross Abstract: We introduce a novel version of the geometric scattering transform for geometric graphs containing scalar and vector node features. This new scattering transform has desirable symmetries with respect to rigid-body roto-translations (i.e., $SE(3)$-equivariance) and may…

Minimax and Bayes Optimal Best-Arm Identification

arXiv:2506.24007v3 Announce Type: replace-cross Abstract: This study investigates minimax and Bayes optimal strategies in fixed-budget best-arm identification. We consider an adaptive procedure consisting of a sampling phase followed by a recommendation phase, and we design an adaptive experiment within this…

Direct Preference Optimization for Adaptive Concept-based Explanations

arXiv:2505.15626v2 Announce Type: replace-cross Abstract: Concept-based explanation methods aim at making machine learning models more transparent by finding the most important semantic features of an input (e.g., colors, patterns, shapes) for a given prediction task. However, these methods generally ignore…