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Learning without training: The implicit dynamics of in-context learning

10 Pith papers cite this work, alongside 2 external citations. Polarity classification is still indexing.

10 Pith papers citing it
2 external citations · Pith
abstract

One of the most striking features of Large Language Models (LLMs) is their ability to learn in-context. Namely at inference time an LLM is able to learn new patterns without any additional weight update when these patterns are presented in the form of examples in the prompt, even if these patterns were not seen during training. The mechanisms through which this can happen are still largely unknown. In this work, we show that the stacking of a self-attention layer with an MLP allows the transformer block to implicitly modify the weights of the MLP layer according to the context. We argue through theoretical analysis and experimentation that this simple mechanism may help explain why LLMs demonstrate capabilities of in-context learning, beyond what is captured during training. Specifically, we show that a standard forward pass with context is mathematically equivalent to a forward pass without context but with the MLP weights updated by a minimal low-rank update representing the context.

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years

2026 9 2025 1

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representative citing papers

Cost-Aware Optimization for Agentic Query Execution

cs.DB · 2026-06-02 · unverdicted · novelty 7.0

EnumGRPO is a self-improving optimizer for agentic query execution that reduces LLM-operator costs by ~317x while improving accuracy by 18% over a hybrid baseline across four databases.

Single-Rollout Hidden-State Dynamics for Training-Free RLVR Data Selection

cs.LG · 2026-05-27 · unverdicted · novelty 6.0

SHIFT selects compact RLVR training subsets using the magnitude of hidden-state change from a single inference rollout plus quality-weighted farthest-first coverage, outperforming training-free baselines on math reasoning and medical QA under low budgets.

Fast Spatial Memory with Elastic Test-Time Training

cs.CV · 2026-04-08 · unverdicted · novelty 6.0

Elastic Test-Time Training stabilizes test-time updates via an elastic prior and moving-average anchor, enabling Fast Spatial Memory for scalable long-sequence 4D reconstruction with reduced memory use and fewer shortcuts.

TTT3R: 3D Reconstruction as Test-Time Training

cs.CV · 2025-09-30 · unverdicted · novelty 5.0

TTT3R derives a closed-form learning rate from memory-observation alignment confidence to boost length generalization in RNN-based 3D reconstruction by 2x in global pose estimation.

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