Self-play red-teaming improves language-model safety by pitting attacker and defender roles against each other in a zero-sum game. However, real adversaries increasingly use mosaic attacks: multi-turn sequences whose individual fragments are innocuous in isolation yet assemble into a harmful payload. We develop a theor...
Emanuele La Malfa, Saar Cohen, G. La Malfa et al.· 0 citations
We study the online allocation of indivisible goods among $n$ agents, where each good must be allocated immediately and irrevocably upon arrival. Against an adaptive adversary, Neoh and Teh [2026] proved that no algorithm can guarantee a positive approximation to proportionality up to one good (PROP1) that is independe...
Saar Cohen, Nicholas J. Teh, Michael Wooldridge· 0 citations
A learning-augmented framework based on predicting joint value-size types, proving consistency under perfect predictions, robustness to prediction error, and showing that separate predictions of value and size marginals are insufficient to recover strong fairness guarantees is developed.
Saar Cohen, Nicholas J. Teh, Paul W. Goldberg et al.· arXiv.org· 4 citations
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