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14,353 papers

#machine learning Preprint Open access Oct 2026

Low-Rank Kolmogorov-Arnold Generator Flows for Interpretable Operator Learning

Neural operators that learn physical laws from data should generalize beyond their training distribution and expose the learned law in closed form. The Kolmogorov-Arnold neural operator achieves both for position-dependent dynamics by learning a dense pseudo-differential symbol over all positions and frequencies, at a...

Minjong Cheon · 0 citations
#machine learning Preprint Open access Oct 2026

Trajectory-Aware Policy Optimization: Closing the State Distribution Gap in Long-Horizon LLM RL

Reinforcement learning (RL) has become a dominant paradigm for enhancing LLMs' reasoning capabilities. Yet long-horizon autoregressive rollouts introduce a fundamental limitation: local policy mismatch can compound into severe state distribution shift over trajectories. Existing LLM RL methods, such as GRPO and GSPO, c...

Zhicheng Cai, Weinan Dai, Yuyan Zhou et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Evidential Multimodal Transformers with Dempster-Shafer Fusion for Emotion Recognition

Softmax-based multimodal emotion recognition methods often assign high confidence even when sensor data are corrupted or contradictory, for example when facial expressions suggest positive valence while vocal prosody indicates negative arousal. We present an Evidential Multimodal Transformer with Dempster-Shafer Fusion...

Muhammad Usama, Yeoreum Jung · 0 citations
#machine learning Preprint Oct 2026

Gaussian-Width Bounds for Offline-to-Online Linear Bandits

We study how offline data can help online learning in stochastic linear bandits. We focus on partially covered offline data, where only $k$ of the $d$ feature directions are poorly covered. Existing analyses of algorithms based on phased elimination and optimism give regret bounds of order $\widetilde O(\sqrt{dkT})$ in...

Kushagra Chandak, В. І. Ткачук, Xiao-Qi Tan et al. · 0 citations
#machine learning Preprint Oct 2026

Diffusion Precipitation Generation with Medium-range Weather Forecasting

Accurate daily precipitation forecasts are important for weather-sensitive decisions. Although recent Weather Foundation Models (WFMs) have achieved significant progress, they are trained on reanalysis data, which exhibit regional and intensity-dependent biases. Since retraining WFMs on observation-based targets is cos...

Guo-Wen Li, Yang Liu, Meng-Xuan Chen et al. · 0 citations
#machine learning Preprint Open access Oct 2026

DataCupid: Stable Matching Repair for Training Data Acquisition with Delayed Feedback

Matching repair after utility changes can reuse valid observations, but new evaluations must respect matching capacity and may return out of order. We study announced invalidations with bounded, possibly reward-dependent reporting delays and pending evaluations that do not occupy future matching capacity. Residualload...

He Sun, Junyuan Mao, Wenhao Jiang et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Controlled-Minimax: Stabilizing Adversarial Optimization via Control Theory

Minimax optimization is fundamental to adversarial learning yet suffers from severe stability challenges, often manifesting as persistent limit cycles or divergence. This paper investigates these instabilities through the lens of continuous-time dynamical systems. By modeling training dynamics as a second-order Ordinar...

Tianjiao Luo, Jianfei Chen, Jun Zhu · 0 citations
#machine learning Preprint Open access Oct 2026

GIST: Generator-state-Informed Supervision for Tabular Foundation Models

Tabular foundation models (TFMs) based on prior-data fitted networks typically use sampled hard query labels, leaving avoidable sampling variability in pretraining. A key observation is that intermediate generator states can reveal label uncertainty beyond a sampled outcome. We propose Generator-state-Informed Supervis...

Zhangyang Peng, Jingze Shi, Tongyi Zhang et al. · 0 citations
#machine learning Preprint Oct 2026

Personalized Federated Direct Preference Optimization via LoRA Adapters

Federated Direct Preference Optimization (FedDPO) enables privacy-preserving alignment of language models across distributed agents without centralizing sensitive preference data. However, existing FedDPO analysis assumes all clients converge to a single shared policy, which is fundamentally at odds with the heterogene...

Zhan-Hong Jiang, Soumik Sarkar · 0 citations
#machine learning Preprint Open access Oct 2026

CoGameReg: Cooperative-Game-Based Collaborative Semi-Supervised Regression for Seismic Reservoir Property Prediction

Accurate estimation of reservoir properties from seismic data remains challenging when well-log labels are sparse but three-dimensional seismic observations are abundant. We present CoGameReg, a cooperative-game-based semi-supervised regression framework that uses contribution-weighted predictions of heterogeneous regr...

Zhiyu Guo, Jiwei Jia, Lei Li · 0 citations
#machine learning Preprint Open access Oct 2026

HART: Hybrid Attention-RWKV Time series Foundation Model

Non-autoregressive multi-step forecasting (NAF) enables time series foundation models to predict an entire future horizon in a single forward pass. Despite its strong sequence modeling capabilities, RWKV-7 exhibits long-horizon degradation in our NAF experiments. In this setup, future patches are represented as missing...

Qingwen Lin, Boyan Xu, Shifeng Xie et al. · 0 citations
#machine learning Preprint Open access Oct 2026

Robust Langevin Sampling under State-Dependent Heavy-Tailed Noise with Applications to LLM Fine-Tuning

Existing convergence guarantees for non-log-concave sampling with stochastic gradient Langevin Monte Carlo (SG-LMC) typically assume globally Lipschitz gradients and uniformly bounded noise variance. Both assumptions can fail even in elementary sampling problems, and relaxing them better reflects practical applications...

M. Berk Sahin, Ege C. Kaya, Arda Fazla et al. · 0 citations

From tech blogs

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Microsoft Research Blog Oct 12, 2026

Simulating student learning for better AI tutoring

StudentSim is a research system for evaluating and improving AI tutoring tools before they are tested with learners. It models how individuals may engage with tutors, giving feedback to improve tutor performance across subjects like chess, writing, and mathematics. The post Simulating student learning for better AI tutoring appeared first on Microsoft Research.

MIT News · Artificial Intelligence Oct 7, 2026

Discovering the value of humanistic inquiry

Students in MIT’s Concourse program delve deeply into the human condition, debate challenging questions, and learn to develop judgment about issues that can’t be quantified.

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