Authors

Mathis Le Bail

Publications 2

Preprint Open access

PatchBench: Measuring Collateral Damage in Activation Patching

Alexi Canesse, Mathis Le Bail, Maël Jenny et al. · 2026

An LLM safety patch can pass a benchmark while still being a poor repair. This risk is especially acute for jailbreak repairs, where the goal is to correct a specific unsafe behaviour without changing unrelated behaviours. A patch may block exact evaluation prompts yet fail on close harmful variants, or suppress harmfu …

Preprint Open access

Reformulation-Contrastive Learning for Mixed Integer Programs

Ousema Bouaneni, Mathis Le Bail, Clément Elliker et al. · 2026

Mixed-integer linear programs (MILP) model many real-world decision problems, motivating machine-learning methods that exploit recurring structure to accelerate MILP solving. MILPs can admit many equivalent formulations: integrality-preserving changes of variables and the addition of redundant constraints can alter the …

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