SaarCohen

I am a Postdoctoral Research Associate in the Department of Computer Science at the University of Oxford, hosted by Prof. Michael Wooldridge.

My research is about multi-agent systems, in which several agents with their own goals make decisions that affect one another. I approach them mainly through game theory and computational social choice, and through machine learning. Many of the problems I study are sequential; agents or resources arrive over time, and decisions have to be made before the future is known.

One strand of my work concerns how agents form coalitions and how goods and resources can be allocated fairly, often in these online settings. Another concerns learning: how agents can learn their preferences and stable outcomes from feedback, and how learning models such as graph neural networks can be given provable guarantees. Most recently, I have been working on the safety of large language models, studying self-play red teaming as a game between an attacker and a defender.

I completed my Ph.D. at Bar-Ilan University with Prof. Noa Agmon, with a thesis on coalition formation in sequential decision-making under uncertainty.