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@OPTML-Group

OPTML Group

Welcome to the OPTML Group's GitHub Repository!

About Us

OPtimization and Trustworthy Machine Learning (OPTML) group (Group Website) is an active research group at Michigan State University. Our research interests span the areas of machine learning (ML)/deep learning (DL), optimization, computer vision, security, signal processing and data science, with a focus on developing learning algorithms and theory, as well as robust and explainable artificial intelligence (AI). These research themes provide a solid foundation for reaching the long-term research objective: Making AI systems scalable and trustworthy.

As AI moves from the lab into the real world (e.g., autonomous vehicles), ensuring its safety becomes a paramount requirement prior to its deployment. Moreover, as datasets, ML/DL models, and learning tasks become increasingly complex, getting ML/DL to scale calls for new advances in learning algorithm design. More broadly, the study towards robust and scalable AI could make a significant impact on machine learning theories, and induce more promising applications in, e.g., automated ML, meta-learning, privacy and security, hardware design, and big data analysis. We seek a new learning frontier when the current learning algorithms become infeasible, and formalize foundations of secure learning.

We always look for passionate students to join the team in terms of RA/TA/externship/internship/visiting students (more info)!

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  1. Unlearn-Saliency Unlearn-Saliency Public

    [ICLR24 (Spotlight)] "SalUn: Empowering Machine Unlearning via Gradient-based Weight Saliency in Both Image Classification and Generation" by Chongyu Fan*, Jiancheng Liu*, Yihua Zhang, Eric Wong, D…

    Python 145 29

  2. UnlearnCanvas UnlearnCanvas Public

    [NeurIPS 2024 D&B Track] UnlearnCanvas: A Stylized Image Dataset to Benchmark Machine Unlearning for Diffusion Models by Yihua Zhang, Chongyu Fan, Yimeng Zhang, Yuguang Yao, Jinghan Jia, Jiancheng …

    Python 83 5

  3. Diffusion-MU-Attack Diffusion-MU-Attack Public

    The official implementation of ECCV'24 paper "To Generate or Not? Safety-Driven Unlearned Diffusion Models Are Still Easy To Generate Unsafe Images ... For Now". This work introduces one fast and e…

    Python 87 5

  4. AdvUnlearn AdvUnlearn Public

    Official implementation of NeurIPS'24 paper "Defensive Unlearning with Adversarial Training for Robust Concept Erasure in Diffusion Models". This work adversarially unlearns the text encoder to enh…

    Jupyter Notebook 50 3

  5. Unlearn-Sparse Unlearn-Sparse Public

    [NeurIPS23 (Spotlight)] "Model Sparsity Can Simplify Machine Unlearning" by Jinghan Jia*, Jiancheng Liu*, Parikshit Ram, Yuguang Yao, Gaowen Liu, Yang Liu, Pranay Sharma, Sijia Liu

    Python 85 11

  6. Unlearn-Simple Unlearn-Simple Public

    [NeurIPS25] Official repo for "Simplicity Prevails: Rethinking Negative Preference Optimization for LLM Unlearning"

    Python 43 13

Repositories

Showing 10 of 41 repositories
  • OPTML-Group/OPTML-Group.github.io’s past year of commit activity
    SCSS 1 3 0 0 Updated Apr 17, 2026
  • VLM-Safety-Unlearn Public

    [ICLR26] Safety Mirage: How Spurious Correlations Undermine VLM Safety Fine-tuning

    OPTML-Group/VLM-Safety-Unlearn’s past year of commit activity
    Python 18 MIT 2 0 0 Updated Apr 16, 2026
  • LLM-Biometrics Public

    Who Built This Model? Tracing LLM Lineage via Spectral Fingerprints in Weight Space

    OPTML-Group/LLM-Biometrics’s past year of commit activity
    0 MIT 0 0 0 Updated Apr 9, 2026
  • Unlearn-Trace Public

    [ICLR26] Unlearning Isn't Invisible: Detecting Unlearning Traces in LLMs from Model Outputs

    OPTML-Group/Unlearn-Trace’s past year of commit activity
    Python 24 MIT 1 0 0 Updated Apr 8, 2026
  • SIFT Public

    [Arxiv] Official repo for "Subspace Control: Turning Constrained Model Steering into Controllable Spectral Optimization"

    OPTML-Group/SIFT’s past year of commit activity
    Python 3 0 0 0 Updated Apr 5, 2026
  • CyclicReflex Public

    [ICLR26] "CyclicReflex: Improving Reasoning Models via Cyclical Reflection Token Scheduling" by Chongyu Fan, Yihua Zhang, Jinghan Jia, Alfred Hero, Sijia Liu

    OPTML-Group/CyclicReflex’s past year of commit activity
    Python 6 MIT 2 0 0 Updated Mar 5, 2026
  • Unlearn-Saliency Public

    [ICLR24 (Spotlight)] "SalUn: Empowering Machine Unlearning via Gradient-based Weight Saliency in Both Image Classification and Generation" by Chongyu Fan*, Jiancheng Liu*, Yihua Zhang, Eric Wong, Dennis Wei, Sijia Liu

    OPTML-Group/Unlearn-Saliency’s past year of commit activity
    Python 145 MIT 29 3 0 Updated Feb 28, 2026
  • Unlearn-Sparse Public

    [NeurIPS23 (Spotlight)] "Model Sparsity Can Simplify Machine Unlearning" by Jinghan Jia*, Jiancheng Liu*, Parikshit Ram, Yuguang Yao, Gaowen Liu, Yang Liu, Pranay Sharma, Sijia Liu

    OPTML-Group/Unlearn-Sparse’s past year of commit activity
    Python 85 MIT 11 3 0 Updated Feb 28, 2026
  • OPTML-Group/Unlearn_Optimizer’s past year of commit activity
    Python 2 MIT 0 0 0 Updated Feb 9, 2026
  • ZO-Muon Public
    OPTML-Group/ZO-Muon’s past year of commit activity
    Python 2 MIT 0 0 0 Updated Feb 9, 2026

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