The asterisks mean that authors are sorted in alphabetical order. 2025 ArXiv Preprint Not All Rollouts are Useful: Down-Sampling Rollouts in LLM Reinforcement Learning Yixuan Even Xu, Yash Savani, Fei Fang, and J. Zico Kolter arXiv preprint arXiv:2504.13818, 2025 arXiv PDF ArXiv Preprint Existing Large Language Model Unlearning Evaluations Are Inconclusive Zhili Feng*, Yixuan Even Xu*, Alexander Robey, Robert Kirk, Xander Davies, Yarin Gal, Avi Schwarzschild, and J. Zico Kolter arXiv preprint arXiv:2506.00688, 2025 arXiv PDF Workshop Evaluating LLM Memorization Using Soft Token Sparsity Zhili Feng*, Yixuan Even Xu*, Pratyush Maini, Alexander Robey, Avi Schwarzschild, and J. Zico Kolter In ICLR Workshop on Sparsity in LLMs, 2025 PDF AAAI 2025 Deviate or Not: Learning Coalition Structures with Multiple-bit Observations in Games Yixuan Even Xu, Zhe Feng, and Fei Fang In Proceedings of the AAAI Conference on Artificial Intelligence, 2025 arXiv PDF Poster Slides Video AAAI 2025 Improving Community-Participated Patrol for Anti-Poaching Yufei Wu, Yixuan Even Xu, Zhang Xuming, Liu Duo, Zhu Shibing, and Fei Fang In Proceedings of the AAAI Conference on Artificial Intelligence, 2025 Selected for Oral Presentation arXiv PDF Poster Slides Video 2024 NeurIPS 2024 Aggregating Quantitative Relative Judgments: From Social Choice to Ranking Prediction Yixuan Even Xu, Hanrui Zhang, Yu Cheng, and Vincent Conitzer In Advances in Neural Information Processing Systems, 2024 arXiv PDF Poster Slides Video WWW 2024 Bidder Selection Problem in Position Auctions: A Fast and Simple Algorithm via Poisson Approximation Nick Gravin*, Yixuan Even Xu*, and Renfei Zhou* In Proceedings of the ACM Web Conference, 2024 Selected for Oral Presentation arXiv PDF Poster Slides Video AAAI 2024 Learning Coalition Structures with Games Yixuan Even Xu, Chun Kai Ling, and Fei Fang In Proceedings of the AAAI Conference on Artificial Intelligence, 2024 arXiv PDF Poster Slides Video AAAI 2024 Non-excludable Bilateral Trade between Groups Yixuan Even Xu, Hanrui Zhang, and Vincent Conitzer In Proceedings of the AAAI Conference on Artificial Intelligence, 2024 arXiv PDF Poster Slides Video 2023 NeurIPS 2023 A One-Size-Fits-All Approach to Improving Randomness in Paper Assignment Yixuan Even Xu, Steven Jecmen, Zimeng Song, and Fei Fang In Advances in Neural Information Processing Systems, 2023 Selected for Spotlight Presentation Deployed in NeurIPS 2024 and 2025 Covered by NeurIPS conference blog arXiv PDF Poster Slides Video ESA 2023 On the Perturbation Function of Ranking and Balance for Weighted Online Bipartite Matching Jingxun Liang*, Zhihao Gavin Tang*, Yixuan Even Xu*, Yuhao Zhang*, and Renfei Zhou* In European Symposium on Algorithms, 2023 arXiv PDF