Taming the Long Tail: Efficient Item-wise Sharpness-Aware Minimization for LLM-based Recommender Systems.

@inproceedings{zhang-2026-taming, author = {Jiaming Zhang and Yuyuan Li and Xiaohua Feng and Li Zhang and Longfei Li and Jun Zhou and Chaochao Chen}, editor = {Hakim Hacid and Yoelle Maarek and Francesco Bonchi and Ido Guy and Emine Yilmaz}, title = {{Taming the Long Tail: Efficient Item-wise Sharpness-Aware Minimization for LLM-based Recommender Systems}}, booktitle = {{Proceedings of the ACM Web Conference 2026, WWW 2026, Dubai, United Arab Emirates, originally scheduled for April 13-17, 2026, rescheduled for June 29 - July 3, 2026}}, pages = {6932--6943}, publisher = {ACM}, year = {2026}, url = {https://doi.org/10.1145/3774904.3792736}, doi = {https://doi.org/10.1145/3774904.3792736} }