Publications

2025

1. arXiv

   

   MaPPO: Maximum a Posteriori Preference Optimization with Prior Knowledge

   Guangchen Lan, Sipeng Zhang, Tianle Wang, Yuwei Zhang, Daoan Zhang, Xinpeng Wei, and 4 more authors

   arXiv:2507.21183, 2025

   Bib PDF

   @article{lan2025mappo,
     title = {{MaPPO}: Maximum a Posteriori Preference Optimization with Prior Knowledge},
     author = {Lan, Guangchen and Zhang, Sipeng and Wang, Tianle and Zhang, Yuwei and Zhang, Daoan and Wei, Xinpeng and Pan, Xiaoman and Zhang, Hongming and Han, Dong-Jun and Brinton, Christopher G},
     journal = {arXiv:2507.21183},
     year = {2025},
   }

2. NeurIPS 2025

   

   Contextual Integrity in LLMs via Reasoning and Reinforcement Learning

   Guangchen Lan, Huseyin A Inan, Sahar Abdelnabi, Janardhan Kulkarni, Lukas Wutschitz, Reza Shokri, and 2 more authors

   In NeurIPS, 2025

   Bib PDF

   @inproceedings{lan2025contextual,
     title = {Contextual Integrity in {LLMs} via Reasoning and Reinforcement Learning},
     author = {Lan, Guangchen and Inan, Huseyin A and Abdelnabi, Sahar and Kulkarni, Janardhan and Wutschitz, Lukas and Shokri, Reza and Brinton, Christopher G and Sim, Robert},
     booktitle = {NeurIPS},
     year = {2025},
   }

3. ICLR 2025

   

   Asynchronous Federated Reinforcement Learning with Policy Gradient Updates: Algorithm Design and Convergence Analysis

   Guangchen Lan, Dong-Jun Han, Abolfazl Hashemi, Vaneet Aggarwal, and Christopher G Brinton

   In ICLR, 2025

   Bib PDF

   @inproceedings{lan2025asynchronous,
     title = {Asynchronous Federated Reinforcement Learning with Policy Gradient Updates: Algorithm Design and Convergence Analysis},
     author = {Lan, Guangchen and Han, Dong-Jun and Hashemi, Abolfazl and Aggarwal, Vaneet and Brinton, Christopher G},
     booktitle = {ICLR},
     year = {2025},
   }

2023

1. NeurIPS 2023

   

   Improved Communication Efficiency in Federated Natural Policy Gradient via ADMM-based Gradient Updates

   Guangchen Lan, Han Wang, James Anderson, Christopher Brinton, and Vaneet Aggarwal

   In NeurIPS, 2023

   Bib PDF

   @inproceedings{lan2023improved,
     title = {Improved Communication Efficiency in Federated Natural Policy Gradient via ADMM-based Gradient Updates},
     author = {Lan, Guangchen and Wang, Han and Anderson, James and Brinton, Christopher and Aggarwal, Vaneet},
     booktitle = {NeurIPS},
     year = {2023},
   }

2. IEEE Trans

   

   Communication-Efficient Federated Learning for Resource-Constrained Edge Devices

   Guangchen Lan, Xiao-Yang Liu, Yijing Zhang, and Xiaodong Wang

   IEEE Transactions on Machine Learning in Communications and Networking, 2023

   Bib PDF

   @article{lan2023communication,
     title = {Communication-Efficient Federated Learning for Resource-Constrained Edge Devices},
     author = {Lan, Guangchen and Liu, Xiao-Yang and Zhang, Yijing and Wang, Xiaodong},
     journal = {IEEE Transactions on Machine Learning in Communications and Networking},
     year = {2023},
   }