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Author

Tuomas Sandholm

3 papers indexed here

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#artificial intelligence Preprint Oct 2026

Fundamental Impossibility Results in AI Safety: Trading Off between Desiderata

This work formalizes the interaction between AI systems and users as a game with three players: a defender and an attacker that are computationally or informationally bounded, and an AI that provides public advice and is less constrained.

Ida Mattsson, Ratip Emin Berker, Emanuel Tewolde et al. · 0 citations
Preprint Sep 2026

Regularized policy gradient with learned mixtures of Gaussians for games with continuous actions

Most successes of superhuman game-playing algorithms are in games with discrete actions, yet in auctions, robotics, sports, or trading, actions are nearly continuous. Prior techniques either rely on expert-designed discretizations or are sample inefficient. We present a scalable policy-gradient algorithm for large sequ...

Ondrej Kubícek, Viliam Lisý, Tuomas Sandholm · 0 citations
#small language model Preprint Aug 2026

Test-time Reinforcement Learning in Imperfect Information Games

This work extends the concept of gadget game, tabular technique for test-time search, to the reinforcement learning setting and formally proves that, unlike prior tabular algorithms, regularized policy-gradient algorithms limit possible strategy degradation caused by test-time reasoning, even without the gadget games.

Ondrej Kubícek, Viliam Lisý, Tuomas Sandholm · 1 citation

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