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Lijun Zhang

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• Sign-Based Optimizers Are Effective Under Heavy-Tailed Noise
• Triplets Better Than Pairs: Towards Stable and Effective Self-Play Fine-Tuning for LLMs
• SPACE: Noise Contrastive Estimation Stabilizes Self-Play Fine-Tuning for Large Language Models
• Parameter-Free Clustering via Self-Supervised Consensus Maximization (Extended Version)
• SeCon-RAG: A Two-Stage Semantic Filtering and Conflict-Free Framework for Trustworthy RAG