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cs.CL2026
How Transformers Reject Wrong Answers: Rotational Dynamics of Factual Constraint Processing
Javier MarÃn
When a decoder-only transformer is forced to process matched correct and incorrect single-token continuations of a factual query, the two pathways through hidden-state space diverg…
cs.CL2025
Empirical Characterization of Temporal Constraint Processing in LLMs
Javier MarÃn
When deploying LLMs in agentic architectures requiring real-time decisions under temporal constraints, we assume they reliably determine whether action windows remain open or have…
cs.CL2025
APE: Selective Fine-tuning with Acceptance Criteria for Language Model Adaptation
Javier MarÃn
We present Adjacent Possible Exploration (APE), a selective fine-tuning method for adapting large language models that systematically explores parameter modifications while maintai…