Author

Weiqiang Zheng

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#machine learning Preprint Sep 2026

Algorithmic Collusion and the Complexity of Information-Value-Free Equilibria

A (coarse) correlated equilibrium (CE) is information-value-free (IVF) if a player can match the payoff obtained from recommendations by committing to a fixed action. Motivated by the problem of regulating algorithmic collusion, this refinement was introduced by Hartline, Wang, and Zhang [EC'26], who showed that it can...

I. Anagnostides, Weiqiang Zheng · 0 citations

Preprint Aug 2026

Optimal Alternating Regret for Online Learning and Games

We settle the minimax-optimal alternating regret, a regret notion motivated by alternating learning dynamics in games, for both online linear optimization (OLO) and online convex optimization (OCO). For OLO over the probability simplex $\Delta_d$, we give an algorithm with $O(\log d)$ alternating regret that remains a...

Yixin Tao, Weiqiang Zheng · 1 citation