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Sijia Liu

2 papers indexed

arxivcs.CLcs.LG2026-07-21

Stochastic Meta-Unlearning: Bridging Language Backbone and Multimodal Unlearning

Zijie Liu, Jinhao Duan, Gaowen Liu, Sijia Liu, Tianlong Chen

Machine unlearning for vision-language models (VLMs) remains underexplored. Unlike language models, VLMs combine a language backbone with visual components, which makes unlearning more complex. There is a surprising phenomenon when moving from single-modality unlearning to VLM un…

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arxivcs.LG2026-07-08

UP: Unbounded Positive Asymmetric Optimization for Breaking the Exploration-Stability Dilemma

Chongyu Fan, Pengfei Liu, Jingjia Huang, Sijia Liu, Yi Lin

Reinforcement learning (RL) has become the standard paradigm for enhancing the complex reasoning capabilities of large language models (LLMs). To achieve sample efficiency, modern RL frameworks rely on importance sampling (IS). However, these algorithms suffer from an exploration…

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