Agentic retrieval-augmented reasoning reshapes collective reliability under model variability in radiology question answering

This study demonstrates that agentic retrieval-augmented reasoning pipelines significantly enhance the collective reliability, consensus strength, and cross-model robustness of large language models in radiology question answering compared to zero-shot inference, while highlighting that accuracy and agreement alone are insufficient metrics for evaluating clinical safety under model variability.

Mina Farajiamiri, Jeta Sopa, Saba Afza, Lisa Adams, Felix Barajas Ordonez, Tri-Thien Nguyen, Mahshad Lotfinia, Sebastian Wind, Keno Bressem, Sven Nebelung, Daniel Truhn, Soroosh Tayebi Arasteh2026-03-09🤖 cs.AI

Stem: Rethinking Causal Information Flow in Sparse Attention

This paper introduces Stem, a novel plug-and-play sparse attention module that overcomes the quadratic complexity bottleneck in long-context LLMs by aligning sparsity with causal information flow through position-dependent token retention and an output-aware metric, thereby achieving superior accuracy with reduced computational cost and latency.

Lin Niu, Xin Luo, Linchuan Xie, Yifu Sun, Guanghua Yu, Jianchen Zhu, S Kevin Zhou2026-03-09🤖 cs.AI

Learning Where the Physics Is: Probabilistic Adaptive Sampling for Stiff PDEs

The paper introduces GMM-PIELM, a probabilistic adaptive sampling framework that significantly improves the accuracy and conditioning of Physics-Informed Extreme Learning Machines for stiff PDEs by autonomously concentrating basis function centers in high-error regions like shock fronts, achieving orders-of-magnitude lower errors than baseline methods while retaining rapid closed-form training speeds.

Akshay Govind Srinivasan, Balaji Srinivasan2026-03-09🤖 cs.AI

3D CBCT Artefact Removal Using Perpendicular Score-Based Diffusion Models

This paper proposes a novel 3D dental implant inpainting method using perpendicular score-based diffusion models that operate in the projection domain to capture inter-projection correlations, thereby generating high-quality, artifact-reduced CBCT images with improved consistency compared to existing 2D-based approaches.

Susanne Schaub, Florentin Bieder, Matheus L. Oliveira, Yulan Wang, Dorothea Dagassan-Berndt, Michael M. Bornstein, Philippe C. Cattin2026-03-09🤖 cs.LG

From Entropy to Calibrated Uncertainty: Training Language Models to Reason About Uncertainty

This paper proposes a three-stage post-training pipeline that computes fine-grained entropy-based uncertainty, calibrates them via Platt scaling, and uses reinforcement learning to teach language models to efficiently generate interpretable and well-calibrated uncertainty estimates at test time, outperforming existing post-hoc methods in both performance and generalization.

Azza Jenane, Nassim Walha, Lukas Kuhn, Florian Buettner2026-03-09🤖 cs.AI

SAHOO: Safeguarded Alignment for High-Order Optimization Objectives in Recursive Self-Improvement

The paper introduces SAHOO, a practical framework that employs a Goal Drift Index, constraint preservation checks, and regression-risk quantification to effectively monitor and control alignment drift while significantly improving performance in recursive self-improving systems across code, reasoning, and truthfulness tasks.

Subramanyam Sahoo, Aman Chadha, Vinija Jain, Divya Chaudhary2026-03-09🤖 cs.AI

AI End-to-End Radiation Treatment Planning Under One Second

The paper introduces AIRT, an end-to-end deep-learning framework that generates high-quality, deliverable single-arc VMAT prostate treatment plans in under one second directly from CT images and contours, demonstrating non-inferiority to standard clinical planning systems while significantly accelerating workflow efficiency.

Simon Arberet, Riqiang Gao, Martin Kraus, Florin C. Ghesu, Wilko Verbakel, Mamadou Diallo, Anthony Magliari, Venkatesan Karuppusamy, Sushil Beriwal, REQUITE Consortium, Ali Kamen, Dorin Comaniciu2026-03-09🤖 cs.AI

Frequency-Separable Hamiltonian Neural Network for Multi-Timescale Dynamics

The paper introduces the Frequency-Separable Hamiltonian Neural Network (FS-HNN), a novel architecture that decomposes Hamiltonian functions into distinct fast and slow modes trained on different timescales to overcome the spectral bias of existing methods and significantly improve long-horizon extrapolation for multi-timescale dynamical systems and PDEs.

Yaojun Li, Yulong Yang, Christine Allen-Blanchette2026-03-09🤖 cs.LG

Adaptive Lipschitz-Free Conditional Gradient Methods for Stochastic Composite Nonconvex Optimization

This paper introduces ALFCG, the first adaptive, projection-free framework for stochastic composite nonconvex optimization that eliminates the need for global smoothness constants or line search by using self-normalized accumulators to estimate local smoothness, achieving optimal iteration complexity up to logarithmic factors while outperforming state-of-the-art baselines.

Ganzhao Yuan2026-03-09🤖 cs.LG

Talk Freely, Execute Strictly: Schema-Gated Agentic AI for Flexible and Reproducible Scientific Workflows

This paper proposes a schema-gated agentic AI architecture that resolves the trade-off between conversational flexibility and execution determinism in scientific workflows by enforcing machine-checkable specifications as mandatory execution boundaries, a solution validated through multi-model LLM scoring of 20 existing systems.

Joel Strickland, Arjun Vijeta, Chris Moores, Oliwia Bodek, Bogdan Nenchev, Thomas Whitehead, Charles Phillips, Karl Tassenberg, Gareth Conduit, Ben Pellegrini2026-03-09🤖 cs.AI

Efficient, Property-Aligned Fan-Out Retrieval via RL-Compiled Diffusion

The paper proposes R4T, a three-stage framework that leverages reinforcement learning to synthesize objective-aligned training data for a lightweight diffusion retriever, enabling efficient, high-quality set-valued retrieval that optimizes complex properties like diversity and coverage while significantly reducing inference latency compared to RL-based baselines.

Pengcheng Jiang, Judith Yue Li, Moonkyung Ryu, R. Lily Hu, Kun Su, Zhong Yi Wan, Liam Hebert, Hao Peng, Jiawei Han, Dima Kuzmin, Craig Boutilier2026-03-09🤖 cs.LG