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1701 matching published research entries
Machine Learning · 2026-11-02

Steering Vectors as a Training Signal in LLM Post-Training

arXiv:2610.40998v1 Announce Type: new Abstract: Steering vectors (SVs) are residual-stream directions that shift the behavior of LLMs when added to hidden states at inference time. While prior work has mainly used SVs as post-hoc controls, we ask whether the same directions can also guide parameter updates during post-training.

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Machine Learning · 2026-11-02

Monte Carlo Random Walk Kernel

arXiv:2610.40956v1 Announce Type: new Abstract: We introduce the Monte Carlo Random Walk Kernel (MCRWK), an estimator whose per-pair cost is independent of graph size and derived directly from the random walk kernel (RWK) expansion. By normalizing the kernel coefficients, MCRWK samples a shared walk length and estimates its contribution using random walks on the input graphs.

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Machine Learning · 2026-11-02

On the Origin and Evolution of Training-Inference Mismatch in LLM Reinforcement Learning

arXiv:2610.40945v1 Announce Type: new Abstract: On-policy reinforcement learning for large language models assumes that training responses are sampled from the current policy. In practice, an inference engine samples the responses and a separate trainer computes the gradients, and the \textbf{training-inference mismatch} between the two makes the training data off-policy.

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Machine Learning · 2026-11-02

Fair Recommender Systems for Intersecting Groups

arXiv:2610.40936v1 Announce Type: new Abstract: Recommendation systems that optimize for the average user can fail to capture the preferences of diverse demographic groups. We consider a dynamic recommendation system, where arriving users can belong to different demographic groups. Importantly, these groups can intersect, and a user may belong to several groups.

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Machine Learning · 2026-11-02

TSFLab: A Self-Improving Agent-Agnostic Workbench for Time Series Forecasting Research

arXiv:2610.40901v1 Announce Type: new Abstract: As publications and products on time series forecasting (TSF) proliferate, researchers face a growing burden of analyzing existing work. First, not all publications release code. For instance, only about 20% of arXiv TSF papers have a code link in the surveyed period. Second, released code also requires manual maintenance.

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Machine Learning · 2026-11-02

Near-Optimal First-Order Regret for Bandits with Feedback Graphs

arXiv:2610.40861v1 Announce Type: new Abstract: We study first-order regret guarantees for adversarial bandits with a fixed, known directed feedback graph. For strongly observable graphs, [ACBDK15] establishes a minimax regret of $\widetilde{\Theta}(\sqrt{\alpha T})$, where $\alpha$ denotes the independence number of the graph and $T$ denotes the horizon.

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Machine Learning · 2026-11-02

FARO: Function-Space Adaptive Return-to-Risk Optimization via Cross-Block Equal-Risk-Contribution Budget Allocation

arXiv:2610.40858v1 Announce Type: new Abstract: Training a large language model is compute-bound, and current recipes divide the work between optimizers by hand: orthogonalized momentum for attention and MLP matrices, Adam-style updates for the rest. This division rests on human priors about which layer type deserves which geometry, and it fixes a single global update budget that every parameter block shares.

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Machine Learning · 2026-11-02

Certified Behavioral Retention for Continual Adaptation with Held-Out Anchors

arXiv:2610.40740v1 Announce Type: new Abstract: Continual adaptation requires deciding not only how to update a model, but whether to commit an update without exceeding a declared budget for changes to protected behavior. We introduce Certified Anchor-Based Adaptation (CABA), a candidate-agnostic post-update gate that reserves historical observations from candidate optimization, compares old and candidate policies…

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Machine Learning · 2026-11-02

Automatic Construction of Strong Simple Baselines

arXiv:2610.40700v1 Announce Type: new Abstract: To rigorously establish the value of a novel deep learning method, it must be compared against appropriate baselines. As deep learning has become increasingly common in the physical and life sciences, there have been numerous cases in which apparent progress has turned out to be an artifact of omitted or missing baselines.

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Computer Science · 2026-11-02

Idle Cycles Are Not Wasted Cycles

arXiv:2607.16408v2 Announce Type: replace-cross Abstract: Idle network service cores are treated as wasted compute. This assumption motivates increasingly sophisticated mechanisms that reclaim idle cores at microsecond timescales. We argue that this view no longer matches modern server hardware. On contemporary multicore processors, active cores compete for a shared package-level power and thermal budget.

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