Author

T. Nguyen

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#natural language process... Preprint Sep 2026

An Efficient and Effective Agentic Group Shilling Attack on Recommender Systems

The Agentic Group Attack System (AGAS), a coordinated shilling framework where a central Coordinator directs a group of role-switching worker agents to adaptively promote a target item across different victim families, consistently surpasses strong baselines in target promotion while better preserving benign recommenda...

Q. Nguyen, Trinh Pham, Viet Huynh et al. · 0 citations

#machine learning Preprint Sep 2026

EPIC: Explicit Posterior Item Conditioning for Semantic ID Diffusion Recommendation

Semantic ID (SID) generative recommendation predicts the next item by generating a short tuple of discrete tokens. Recent masked-diffusion methods improve this process through bidirectional context and flexible decoding, yet recommendation ultimately requires selecting among complete catalog items. At each denoising st...

Tuan-Binh Tran, T. Nguyen, Quoc Viet Hung Nguyen et al. · 0 citations